• Digital Manufacturing
• Smart Factory
Clearly defined research question(s) are the key elements which set the focus for study identification and data extraction [21] . These questions are formulated based on the PICOC criteria as presented in the example in Table 2 (PICOC keywords are underlined).
Research questions examples.
Research Questions examples |
---|
• : What are the current challenges of context-aware systems that support the decision-making of business processes in smart manufacturing? • : Which technique is most appropriate to support decision-making for business process management in smart factories? • : In which scenarios are semantic web and machine learning used to provide context-awareness in business process management for smart manufacturing? |
The validity of a study will depend on the proper selection of a database since it must adequately cover the area under investigation [19] . The Web of Science (WoS) is an international and multidisciplinary tool for accessing literature in science, technology, biomedicine, and other disciplines. Scopus is a database that today indexes 40,562 peer-reviewed journals, compared to 24,831 for WoS. Thus, Scopus is currently the largest existing multidisciplinary database. However, it may also be necessary to include sources relevant to computer science, such as EI Compendex, IEEE Xplore, and ACM. Table 3 compares the area of expertise of a selection of databases.
Planning Step 3 “Select digital libraries”. Description of digital libraries in computer science and software engineering.
Database | Description | URL | Area | Advanced Search Y/N |
---|---|---|---|---|
Scopus | From Elsevier. sOne of the largest databases. Very user-friendly interface | Interdisciplinary | Y | |
Web of Science | From Clarivate. Multidisciplinary database with wide ranging content. | Interdisciplinary | Y | |
EI Compendex | From Elsevier. Focused on engineering literature. | Engineering | Y (Query view not available) | |
IEEE Digital Library | Contains scientific and technical articles published by IEEE and its publishing partners. | Engineering and Technology | Y | |
ACM Digital Library | Complete collection of ACM publications. | Computing and information technology | Y |
Authors should define the inclusion and exclusion criteria before conducting the review to prevent bias, although these can be adjusted later, if necessary. The selection of primary studies will depend on these criteria. Articles are included or excluded in this first selection based on abstract and primary bibliographic data. When unsure, the article is skimmed to further decide the relevance for the review. Table 4 sets out some criteria types with descriptions and examples.
Planning Step 4 “Define inclusion and exclusion criteria”. Examples of criteria type.
Criteria Type | Description | Example |
---|---|---|
Period | Articles can be selected based on the time period to review, e.g., reviewing the technology under study from the year it emerged, or reviewing progress in the field since the publication of a prior literature review. | : From 2015 to 2021 Articles prior 2015 |
Language | Articles can be excluded based on language. | : Articles not in English |
Type of Literature | Articles can be excluded if they are fall into the category of grey literature. | Reports, policy literature, working papers, newsletters, government documents, speeches |
Type of source | Articles can be included or excluded by the type of origin, i.e., conference or journal articles or books. | : Articles from Conferences or Journals Articles from books |
Impact Source | Articles can be excluded if the author limits the impact factor or quartile of the source. | Articles from Q1, and Q2 sources : Articles with a Journal Impact Score (JIS) lower than |
Accessibility | Not accessible in specific databases. | : Not accessible |
Relevance to research questions | Articles can be excluded if they are not relevant to a particular question or to “ ” number of research questions. | Not relevant to at least 2 research questions |
Assessing the quality of an article requires an artifact which describes how to perform a detailed assessment. A typical quality assessment is a checklist that contains multiple factors to evaluate. A numerical scale is used to assess the criteria and quantify the QA [22] . Zhou et al. [25] presented a detailed description of assessment criteria in software engineering, classified into four main aspects of study quality: Reporting, Rigor, Credibility, and Relevance. Each of these criteria can be evaluated using, for instance, a Likert-type scale [17] , as shown in Table 5 . It is essential to select the same scale for all criteria established on the quality assessment.
Planning Step 5 “Define QA assessment checklist”. Examples of QA scales and questions.
Do the researchers discuss any problems (limitations, threats) with the validity of their results (reliability)? | 1 – No, and not considered (Score: 0) 2 – Partially (Score: 0.5) 3 – Yes (Score: 1) |
Is there a clear definition/ description/ statement of the aims/ goals/ purposes/ motivations/ objectives/ questions of the research? | 1 – Disagree (Score: 1) 2 – Somewhat disagree (Score: 2) 3 – Neither agree nor disagree (Score: 3) 4 – Somewhat agree (Score: 4) 5 – Agree (Score: 5) |
The data extraction form represents the information necessary to answer the research questions established for the review. Synthesizing the articles is a crucial step when conducting research. Ramesh et al. [15] presented a classification scheme for computer science research, based on topics, research methods, and levels of analysis that can be used to categorize the articles selected. Classification methods and fields to consider when conducting a review are presented in Table 6 .
Planning Step 6 “Define data extraction form”. Examples of fields.
Classification and fields to consider for data extraction | Description and examples |
---|---|
Research type | • focuses on abstract ideas, concepts, and theories built on literature reviews . • uses scientific data or case studies for explorative, descriptive, explanatory, or measurable findings . an SLR on context-awareness for S-PSS and categorized the articles in theoretical and empirical research. |
By process phases, stages | When analyzing a process or series of processes, an effective way to structure the data is to find a well-established framework of reference or architecture. : • an SLR on self-adaptive systems uses the MAPE-K model to understand how the authors tackle each module stage. • presented a context-awareness survey using the stages of context-aware lifecycle to review different methods. |
By technology, framework, or platform | When analyzing a computer science topic, it is important to know the technology currently employed to understand trends, benefits, or limitations. : • an SLR on the big data ecosystem in the manufacturing field that includes frameworks, tools, and platforms for each stage of the big data ecosystem. |
By application field and/or industry domain | If the review is not limited to a specific “Context” or “Population" (industry domain), it can be useful to identify the field of application : • an SLR on adaptive training using virtual reality (VR). The review presents an extensive description of multiple application domains and examines related work. |
Gaps and challenges | Identifying gaps and challenges is important in reviews to determine the research needs and further establish research directions that can help scholars act on the topic. |
Findings in research | Research in computer science can deliver multiple types of findings, e.g.: |
Evaluation method | Case studies, experiments, surveys, mathematical demonstrations, and performance indicators. |
The data extraction must be relevant to the research questions, and the relationship to each of the questions should be included in the form. Kitchenham & Charters [6] presented more pertinent data that can be captured, such as conclusions, recommendations, strengths, and weaknesses. Although the data extraction form can be updated if more information is needed, this should be treated with caution since it can be time-consuming. It can therefore be helpful to first have a general background in the research topic to determine better data extraction criteria.
After defining the protocol, conducting the review requires following each of the steps previously described. Using tools can help simplify the performance of this task. Standard tools such as Excel or Google sheets allow multiple researchers to work collaboratively. Another online tool specifically designed for performing SLRs is Parsif.al 1 . This tool allows researchers, especially in the context of software engineering, to define goals and objectives, import articles using BibTeX files, eliminate duplicates, define selection criteria, and generate reports.
Search strings are built considering the PICOC elements and synonyms to execute the search in each database library. A search string should separate the synonyms with the boolean operator OR. In comparison, the PICOC elements are separated with parentheses and the boolean operator AND. An example is presented next:
(“Smart Manufacturing” OR “Digital Manufacturing” OR “Smart Factory”) AND (“Business Process Management” OR “BPEL” OR “BPM” OR “BPMN”) AND (“Semantic Web” OR “Ontology” OR “Semantic” OR “Semantic Web Service”) AND (“Framework” OR “Extension” OR “Plugin” OR “Tool”
Databases that feature advanced searches enable researchers to perform search queries based on titles, abstracts, and keywords, as well as for years or areas of research. Fig. 1 presents the example of an advanced search in Scopus, using titles, abstracts, and keywords (TITLE-ABS-KEY). Most of the databases allow the use of logical operators (i.e., AND, OR). In the example, the search is for “BIG DATA” and “USER EXPERIENCE” or “UX” as a synonym.
Example of Advanced search on Scopus.
In general, bibliometric data of articles can be exported from the databases as a comma-separated-value file (CSV) or BibTeX file, which is helpful for data extraction and quantitative and qualitative analysis. In addition, researchers should take advantage of reference-management software such as Zotero, Mendeley, Endnote, or Jabref, which import bibliographic information onto the software easily.
The first step in this stage is to identify any duplicates that appear in the different searches in the selected databases. Some automatic procedures, tools like Excel formulas, or programming languages (i.e., Python) can be convenient here.
In the second step, articles are included or excluded according to the selection criteria, mainly by reading titles and abstracts. Finally, the quality is assessed using the predefined scale. Fig. 2 shows an example of an article QA evaluation in Parsif.al, using a simple scale. In this scenario, the scoring procedure is the following YES= 1, PARTIALLY= 0.5, and NO or UNKNOWN = 0 . A cut-off score should be defined to filter those articles that do not pass the QA. The QA will require a light review of the full text of the article.
Performing quality assessment (QA) in Parsif.al.
Those articles that pass the study selection are then thoroughly and critically read. Next, the researcher completes the information required using the “data extraction” form, as illustrated in Fig. 3 , in this scenario using Parsif.al tool.
Example of data extraction form using Parsif.al.
The information required (study characteristics and findings) from each included study must be acquired and documented through careful reading. Data extraction is valuable, especially if the data requires manipulation or assumptions and inferences. Thus, information can be synthesized from the extracted data for qualitative or quantitative analysis [16] . This documentation supports clarity, precise reporting, and the ability to scrutinize and replicate the examination.
The analysis phase examines the synthesized data and extracts meaningful information from the selected articles [10] . There are two main goals in this phase.
The first goal is to analyze the literature in terms of leading authors, journals, countries, and organizations. Furthermore, it helps identify correlations among topic s . Even when not mandatory, this activity can be constructive for researchers to position their work, find trends, and find collaboration opportunities. Next, data from the selected articles can be analyzed using bibliometric analysis (BA). BA summarizes large amounts of bibliometric data to present the state of intellectual structure and emerging trends in a topic or field of research [4] . Table 7 sets out some of the most common bibliometric analysis representations.
Techniques for bibliometric analysis and examples.
Publication-related analysis | Description | Example |
---|---|---|
Years of publications | Determine interest in the research topic by years or the period established by the SLR, by quantifying the number of papers published. Using this information, it is also possible to forecast the growth rate of research interest. | [ ] identified the growth rate of research interest and the yearly publication trend. |
Top contribution journals/conferences | Identify the leading journals and conferences in which authors can share their current and future work. | , |
Top countries' or affiliation contributions | Examine the impacts of countries or affiliations leading the research topic. | [ , ] identified the most influential countries. |
Leading authors | Identify the most significant authors in a research field. | - |
Keyword correlation analysis | Explore existing relationships between topics in a research field based on the written content of the publication or related keywords established in the articles. | using keyword clustering analysis ( ). using frequency analysis. |
Total and average citation | Identify the most relevant publications in a research field. | Scatter plot citation scores and journal factor impact |
Several tools can perform this type of analysis, such as Excel and Google Sheets for statistical graphs or using programming languages such as Python that has available multiple data visualization libraries (i.e. Matplotlib, Seaborn). Cluster maps based on bibliographic data(i.e keywords, authors) can be developed in VosViewer which makes it easy to identify clusters of related items [18] . In Fig. 4 , node size is representative of the number of papers related to the keyword, and lines represent the links among keyword terms.
[1] Keyword co-relationship analysis using clusterization in vos viewer.
This second and most important goal is to answer the formulated research questions, which should include a quantitative and qualitative analysis. The quantitative analysis can make use of data categorized, labelled, or coded in the extraction form (see Section 1.6). This data can be transformed into numerical values to perform statistical analysis. One of the most widely employed method is frequency analysis, which shows the recurrence of an event, and can also represent the percental distribution of the population (i.e., percentage by technology type, frequency of use of different frameworks, etc.). Q ualitative analysis includes the narration of the results, the discussion indicating the way forward in future research work, and inferring a conclusion.
Finally, the literature review report should state the protocol to ensure others researchers can replicate the process and understand how the analysis was performed. In the protocol, it is essential to present the inclusion and exclusion criteria, quality assessment, and rationality beyond these aspects.
The presentation and reporting of results will depend on the structure of the review given by the researchers conducting the SLR, there is no one answer. This structure should tie the studies together into key themes, characteristics, or subgroups [ 28 ].
SLR can be an extensive and demanding task, however the results are beneficial in providing a comprehensive overview of the available evidence on a given topic. For this reason, researchers should keep in mind that the entire process of the SLR is tailored to answer the research question(s). This article has detailed a practical guide with the essential steps to conducting an SLR in the context of computer science and software engineering while citing multiple helpful examples and tools. It is envisaged that this method will assist researchers, and particularly early-stage researchers, in following an algorithmic approach to fulfill this task. Finally, a quick checklist is presented in Appendix A as a companion of this article.
Angela Carrera-Rivera: Conceptualization, Methodology, Writing-Original. William Ochoa-Agurto : Methodology, Writing-Original. Felix Larrinaga : Reviewing and Supervision Ganix Lasa: Reviewing and Supervision.
The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
Funding : This project has received funding from the European Union's Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie Grant No. 814078.
Carrera-Rivera, A., Larrinaga, F., & Lasa, G. (2022). Context-awareness for the design of Smart-product service systems: Literature review. Computers in Industry, 142, 103730.
1 https://parsif.al/
A methodological review is a type of systematic secondary research (i.e., research synthesis) which focuses on summarising the state-of-the-art methodological practices of research in a substantive field or topic" (Chong et al, 2021).
Methodological reviews "can be performed to examine any methodological issues relating to the design, conduct and review of research studies and also evidence syntheses". Munn et al, 2018)
Clarke, M., Oxman, A. D., Paulsen, E., Higgins, J. P. T., & Green, S. (2011). Appendix A: Guide to the contents of a Cochrane Methodology protocol and review. Cochrane Handbook for systematic reviews of interventions . Full Text PDF
Aguinis, H., Ramani, R. S., & Alabduljader, N. (2023). Best-Practice Recommendations for Producers, Evaluators, and Users of Methodological Literature Reviews. Organizational Research Methods, 26(1), 46-76. https://doi.org/10.1177/1094428120943281 Full Text
Jha, C. K., & Kolekar, M. H. (2021). Electrocardiogram data compression techniques for cardiac healthcare systems: A methodological review. IRBM . Full Text
References Munn, Z., Stern, C., Aromataris, E., Lockwood, C., & Jordan, Z. (2018). What kind of systematic review should I conduct? A proposed typology and guidance for systematic reviewers in the medical and health sciences. BMC medical research methodology , 18 (1), 1-9. Full Text Chong, S. W., & Reinders, H. (2021). A methodological review of qualitative research syntheses in CALL: The state-of-the-art. System , 103 , 102646. Full Text
Literature Review is a comprehensive survey of the works published in a particular field of study or line of research, usually over a specific period of time, in the form of an in-depth, critical bibliographic essay or annotated list in which attention is drawn to the most significant works.
Also, we can define a literature review as the collected body of scholarly works related to a topic:
The objective of a Literature Review is to find previous published scholarly works relevant to an specific topic
A literature review is important because it:
All content in this section is from Literature Review Research from Old Dominion University
Keep in mind the following, a literature review is NOT:
Not an essay
Not an annotated bibliography in which you summarize each article that you have reviewed. A literature review goes beyond basic summarizing to focus on the critical analysis of the reviewed works and their relationship to your research question.
Not a research paper where you select resources to support one side of an issue versus another. A lit review should explain and consider all sides of an argument in order to avoid bias, and areas of agreement and disagreement should be highlighted.
A literature review serves several purposes. For example, it
As Kennedy (2007) notes*, it is important to think of knowledge in a given field as consisting of three layers. First, there are the primary studies that researchers conduct and publish. Second are the reviews of those studies that summarize and offer new interpretations built from and often extending beyond the original studies. Third, there are the perceptions, conclusions, opinion, and interpretations that are shared informally that become part of the lore of field. In composing a literature review, it is important to note that it is often this third layer of knowledge that is cited as "true" even though it often has only a loose relationship to the primary studies and secondary literature reviews.
Given this, while literature reviews are designed to provide an overview and synthesis of pertinent sources you have explored, there are several approaches to how they can be done, depending upon the type of analysis underpinning your study. Listed below are definitions of types of literature reviews:
Argumentative Review This form examines literature selectively in order to support or refute an argument, deeply imbedded assumption, or philosophical problem already established in the literature. The purpose is to develop a body of literature that establishes a contrarian viewpoint. Given the value-laden nature of some social science research [e.g., educational reform; immigration control], argumentative approaches to analyzing the literature can be a legitimate and important form of discourse. However, note that they can also introduce problems of bias when they are used to to make summary claims of the sort found in systematic reviews.
Integrative Review Considered a form of research that reviews, critiques, and synthesizes representative literature on a topic in an integrated way such that new frameworks and perspectives on the topic are generated. The body of literature includes all studies that address related or identical hypotheses. A well-done integrative review meets the same standards as primary research in regard to clarity, rigor, and replication.
Historical Review Few things rest in isolation from historical precedent. Historical reviews are focused on examining research throughout a period of time, often starting with the first time an issue, concept, theory, phenomena emerged in the literature, then tracing its evolution within the scholarship of a discipline. The purpose is to place research in a historical context to show familiarity with state-of-the-art developments and to identify the likely directions for future research.
Methodological Review A review does not always focus on what someone said [content], but how they said it [method of analysis]. This approach provides a framework of understanding at different levels (i.e. those of theory, substantive fields, research approaches and data collection and analysis techniques), enables researchers to draw on a wide variety of knowledge ranging from the conceptual level to practical documents for use in fieldwork in the areas of ontological and epistemological consideration, quantitative and qualitative integration, sampling, interviewing, data collection and data analysis, and helps highlight many ethical issues which we should be aware of and consider as we go through our study.
Systematic Review This form consists of an overview of existing evidence pertinent to a clearly formulated research question, which uses pre-specified and standardized methods to identify and critically appraise relevant research, and to collect, report, and analyse data from the studies that are included in the review. Typically it focuses on a very specific empirical question, often posed in a cause-and-effect form, such as "To what extent does A contribute to B?"
Theoretical Review The purpose of this form is to concretely examine the corpus of theory that has accumulated in regard to an issue, concept, theory, phenomena. The theoretical literature review help establish what theories already exist, the relationships between them, to what degree the existing theories have been investigated, and to develop new hypotheses to be tested. Often this form is used to help establish a lack of appropriate theories or reveal that current theories are inadequate for explaining new or emerging research problems. The unit of analysis can focus on a theoretical concept or a whole theory or framework.
* Kennedy, Mary M. "Defining a Literature." Educational Researcher 36 (April 2007): 139-147.
All content in this section is from The Literature Review created by Dr. Robert Larabee USC
Robinson, P. and Lowe, J. (2015), Literature reviews vs systematic reviews. Australian and New Zealand Journal of Public Health, 39: 103-103. doi: 10.1111/1753-6405.12393
What's in the name? The difference between a Systematic Review and a Literature Review, and why it matters . By Lynn Kysh from University of Southern California
Systematic review or meta-analysis?
A systematic review answers a defined research question by collecting and summarizing all empirical evidence that fits pre-specified eligibility criteria.
A meta-analysis is the use of statistical methods to summarize the results of these studies.
Systematic reviews, just like other research articles, can be of varying quality. They are a significant piece of work (the Centre for Reviews and Dissemination at York estimates that a team will take 9-24 months), and to be useful to other researchers and practitioners they should have:
Not all systematic reviews contain meta-analysis.
Meta-analysis is the use of statistical methods to summarize the results of independent studies. By combining information from all relevant studies, meta-analysis can provide more precise estimates of the effects of health care than those derived from the individual studies included within a review. More information on meta-analyses can be found in Cochrane Handbook, Chapter 9 .
A meta-analysis goes beyond critique and integration and conducts secondary statistical analysis on the outcomes of similar studies. It is a systematic review that uses quantitative methods to synthesize and summarize the results.
An advantage of a meta-analysis is the ability to be completely objective in evaluating research findings. Not all topics, however, have sufficient research evidence to allow a meta-analysis to be conducted. In that case, an integrative review is an appropriate strategy.
Some of the content in this section is from Systematic reviews and meta-analyses: step by step guide created by Kate McAllister.
A literature review is a critical analysis and synthesis of existing research on a particular topic. It provides an overview of the current state of knowledge, identifies gaps, and highlights key findings in the literature. 1 The purpose of a literature review is to situate your own research within the context of existing scholarship, demonstrating your understanding of the topic and showing how your work contributes to the ongoing conversation in the field. Learning how to write a literature review is a critical tool for successful research. Your ability to summarize and synthesize prior research pertaining to a certain topic demonstrates your grasp on the topic of study, and assists in the learning process.
A well-conducted literature review demonstrates the researcher’s familiarity with the existing literature, establishes the context for their own research, and contributes to scholarly conversations on the topic. One of the purposes of a literature review is also to help researchers avoid duplicating previous work and ensure that their research is informed by and builds upon the existing body of knowledge.
A literature review serves several important purposes within academic and research contexts. Here are some key objectives and functions of a literature review: 2
1. Contextualizing the Research Problem: The literature review provides a background and context for the research problem under investigation. It helps to situate the study within the existing body of knowledge.
2. Identifying Gaps in Knowledge: By identifying gaps, contradictions, or areas requiring further research, the researcher can shape the research question and justify the significance of the study. This is crucial for ensuring that the new research contributes something novel to the field.
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3. Understanding Theoretical and Conceptual Frameworks: Literature reviews help researchers gain an understanding of the theoretical and conceptual frameworks used in previous studies. This aids in the development of a theoretical framework for the current research.
4. Providing Methodological Insights: Another purpose of literature reviews is that it allows researchers to learn about the methodologies employed in previous studies. This can help in choosing appropriate research methods for the current study and avoiding pitfalls that others may have encountered.
5. Establishing Credibility: A well-conducted literature review demonstrates the researcher’s familiarity with existing scholarship, establishing their credibility and expertise in the field. It also helps in building a solid foundation for the new research.
6. Informing Hypotheses or Research Questions: The literature review guides the formulation of hypotheses or research questions by highlighting relevant findings and areas of uncertainty in existing literature.
Let’s delve deeper with a literature review example: Let’s say your literature review is about the impact of climate change on biodiversity. You might format your literature review into sections such as the effects of climate change on habitat loss and species extinction, phenological changes, and marine biodiversity. Each section would then summarize and analyze relevant studies in those areas, highlighting key findings and identifying gaps in the research. The review would conclude by emphasizing the need for further research on specific aspects of the relationship between climate change and biodiversity. The following literature review template provides a glimpse into the recommended literature review structure and content, demonstrating how research findings are organized around specific themes within a broader topic.
Climate change is a global phenomenon with far-reaching consequences, including significant impacts on biodiversity. This literature review synthesizes key findings from various studies:
Climate change-induced alterations in temperature and precipitation patterns contribute to habitat loss, affecting numerous species (Thomas et al., 2004). The review discusses how these changes increase the risk of extinction, particularly for species with specific habitat requirements.
Observations of range shifts and changes in the timing of biological events (phenology) are documented in response to changing climatic conditions (Parmesan & Yohe, 2003). These shifts affect ecosystems and may lead to mismatches between species and their resources.
The review explores the impact of climate change on marine biodiversity, emphasizing ocean acidification’s threat to coral reefs (Hoegh-Guldberg et al., 2007). Changes in pH levels negatively affect coral calcification, disrupting the delicate balance of marine ecosystems.
Recognizing the urgency of the situation, the literature review discusses various adaptive strategies adopted by species and conservation efforts aimed at mitigating the impacts of climate change on biodiversity (Hannah et al., 2007). It emphasizes the importance of interdisciplinary approaches for effective conservation planning.
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Writing a literature review involves summarizing and synthesizing existing research on a particular topic. A good literature review format should include the following elements.
Introduction: The introduction sets the stage for your literature review, providing context and introducing the main focus of your review.
Body: The body of the literature review is where you provide a comprehensive analysis of existing literature, grouping studies based on themes, methodologies, or other relevant criteria.
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Conclusion: The conclusion of your literature review should summarize the main findings, highlight the contributions of the review, and suggest avenues for future research.
Conducting a literature review is an essential step in research that involves reviewing and analyzing existing literature on a specific topic. It’s important to know how to do a literature review effectively, so here are the steps to follow: 1
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The literature review sample and detailed advice on writing and conducting a review will help you produce a well-structured report. But remember that a good literature review is an ongoing process, and it may be necessary to revisit and update it as your research progresses. By combining effortless research with an easy citation process, Paperpal Research streamlines the literature review process and empowers you to write faster and with more confidence. Try Paperpal Research now and see for yourself.
A literature review is a critical and comprehensive analysis of existing literature (published and unpublished works) on a specific topic or research question and provides a synthesis of the current state of knowledge in a particular field. A well-conducted literature review is crucial for researchers to build upon existing knowledge, avoid duplication of efforts, and contribute to the advancement of their field. It also helps researchers situate their work within a broader context and facilitates the development of a sound theoretical and conceptual framework for their studies.
Literature review is a crucial component of research writing, providing a solid background for a research paper’s investigation. The aim is to keep professionals up to date by providing an understanding of ongoing developments within a specific field, including research methods, and experimental techniques used in that field, and present that knowledge in the form of a written report. Also, the depth and breadth of the literature review emphasizes the credibility of the scholar in his or her field.
Before writing a literature review, it’s essential to undertake several preparatory steps to ensure that your review is well-researched, organized, and focused. This includes choosing a topic of general interest to you and doing exploratory research on that topic, writing an annotated bibliography, and noting major points, especially those that relate to the position you have taken on the topic.
Literature reviews and academic research papers are essential components of scholarly work but serve different purposes within the academic realm. 3 A literature review aims to provide a foundation for understanding the current state of research on a particular topic, identify gaps or controversies, and lay the groundwork for future research. Therefore, it draws heavily from existing academic sources, including books, journal articles, and other scholarly publications. In contrast, an academic research paper aims to present new knowledge, contribute to the academic discourse, and advance the understanding of a specific research question. Therefore, it involves a mix of existing literature (in the introduction and literature review sections) and original data or findings obtained through research methods.
Literature reviews are essential components of academic and research papers, and various strategies can be employed to conduct them effectively. If you want to know how to write a literature review for a research paper, here are four common approaches that are often used by researchers. Chronological Review: This strategy involves organizing the literature based on the chronological order of publication. It helps to trace the development of a topic over time, showing how ideas, theories, and research have evolved. Thematic Review: Thematic reviews focus on identifying and analyzing themes or topics that cut across different studies. Instead of organizing the literature chronologically, it is grouped by key themes or concepts, allowing for a comprehensive exploration of various aspects of the topic. Methodological Review: This strategy involves organizing the literature based on the research methods employed in different studies. It helps to highlight the strengths and weaknesses of various methodologies and allows the reader to evaluate the reliability and validity of the research findings. Theoretical Review: A theoretical review examines the literature based on the theoretical frameworks used in different studies. This approach helps to identify the key theories that have been applied to the topic and assess their contributions to the understanding of the subject. It’s important to note that these strategies are not mutually exclusive, and a literature review may combine elements of more than one approach. The choice of strategy depends on the research question, the nature of the literature available, and the goals of the review. Additionally, other strategies, such as integrative reviews or systematic reviews, may be employed depending on the specific requirements of the research.
The literature review format can vary depending on the specific publication guidelines. However, there are some common elements and structures that are often followed. Here is a general guideline for the format of a literature review: Introduction: Provide an overview of the topic. Define the scope and purpose of the literature review. State the research question or objective. Body: Organize the literature by themes, concepts, or chronology. Critically analyze and evaluate each source. Discuss the strengths and weaknesses of the studies. Highlight any methodological limitations or biases. Identify patterns, connections, or contradictions in the existing research. Conclusion: Summarize the key points discussed in the literature review. Highlight the research gap. Address the research question or objective stated in the introduction. Highlight the contributions of the review and suggest directions for future research.
Both annotated bibliographies and literature reviews involve the examination of scholarly sources. While annotated bibliographies focus on individual sources with brief annotations, literature reviews provide a more in-depth, integrated, and comprehensive analysis of existing literature on a specific topic. The key differences are as follows:
Annotated Bibliography | Literature Review | |
Purpose | List of citations of books, articles, and other sources with a brief description (annotation) of each source. | Comprehensive and critical analysis of existing literature on a specific topic. |
Focus | Summary and evaluation of each source, including its relevance, methodology, and key findings. | Provides an overview of the current state of knowledge on a particular subject and identifies gaps, trends, and patterns in existing literature. |
Structure | Each citation is followed by a concise paragraph (annotation) that describes the source’s content, methodology, and its contribution to the topic. | The literature review is organized thematically or chronologically and involves a synthesis of the findings from different sources to build a narrative or argument. |
Length | Typically 100-200 words | Length of literature review ranges from a few pages to several chapters |
Independence | Each source is treated separately, with less emphasis on synthesizing the information across sources. | The writer synthesizes information from multiple sources to present a cohesive overview of the topic. |
References
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Literature reviews, what is a literature review, learning more about how to do a literature review.
A literature review is a review and synthesis of existing research on a topic or research question. A literature review is meant to analyze the scholarly literature, make connections across writings and identify strengths, weaknesses, trends, and missing conversations. A literature review should address different aspects of a topic as it relates to your research question. A literature review goes beyond a description or summary of the literature you have read.
A literature review involves researching, reading, analyzing, evaluating, and summarizing scholarly literature (typically journals and articles) about a specific topic. The results of a literature review may be an entire report or article OR may be part of a article, thesis, dissertation, or grant proposal. A literature review helps the author learn about the history and nature of their topic, and identify research gaps and problems.
Problem formulation
Elements of a Literature Review
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A literature or narrative review is a comprehensive review and analysis of the published literature on a specific topic or research question. The literature that is reviewed contains: books, articles, academic articles, conference proceedings, association papers, and dissertations. It contains the most pertinent studies and points to important past and current research and practices. It provides background and context, and shows how your research will contribute to the field.
A literature review should:
From S age Research Methods
A literature review can be written as an introduction to a study to:
Or it can be a separate work (a research article on its own) which:
Some of the limitations of a literature review are:
Source: Grant, Maria J., and Andrew Booth. “A Typology of Reviews: An Analysis of 14 Review Types and Associated Methodologies.” Health Information & Libraries Journal, vol. 26, no. 2, June 2009, pp. 91–108. Wiley Online Library, doi:10.1111/j.1471-1842.2009.00848.x.
For help, please contact the librarian for your subject area. We have a guide to library specialists by subject .
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Methodology
Published on June 15, 2022 by Shaun Turney . Revised on November 20, 2023.
A systematic review is a type of review that uses repeatable methods to find, select, and synthesize all available evidence. It answers a clearly formulated research question and explicitly states the methods used to arrive at the answer.
They answered the question “What is the effectiveness of probiotics in reducing eczema symptoms and improving quality of life in patients with eczema?”
In this context, a probiotic is a health product that contains live microorganisms and is taken by mouth. Eczema is a common skin condition that causes red, itchy skin.
What is a systematic review, systematic review vs. meta-analysis, systematic review vs. literature review, systematic review vs. scoping review, when to conduct a systematic review, pros and cons of systematic reviews, step-by-step example of a systematic review, other interesting articles, frequently asked questions about systematic reviews.
A review is an overview of the research that’s already been completed on a topic.
What makes a systematic review different from other types of reviews is that the research methods are designed to reduce bias . The methods are repeatable, and the approach is formal and systematic:
Although multiple sets of guidelines exist, the Cochrane Handbook for Systematic Reviews is among the most widely used. It provides detailed guidelines on how to complete each step of the systematic review process.
Systematic reviews are most commonly used in medical and public health research, but they can also be found in other disciplines.
Systematic reviews typically answer their research question by synthesizing all available evidence and evaluating the quality of the evidence. Synthesizing means bringing together different information to tell a single, cohesive story. The synthesis can be narrative ( qualitative ), quantitative , or both.
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Systematic reviews often quantitatively synthesize the evidence using a meta-analysis . A meta-analysis is a statistical analysis, not a type of review.
A meta-analysis is a technique to synthesize results from multiple studies. It’s a statistical analysis that combines the results of two or more studies, usually to estimate an effect size .
A literature review is a type of review that uses a less systematic and formal approach than a systematic review. Typically, an expert in a topic will qualitatively summarize and evaluate previous work, without using a formal, explicit method.
Although literature reviews are often less time-consuming and can be insightful or helpful, they have a higher risk of bias and are less transparent than systematic reviews.
Similar to a systematic review, a scoping review is a type of review that tries to minimize bias by using transparent and repeatable methods.
However, a scoping review isn’t a type of systematic review. The most important difference is the goal: rather than answering a specific question, a scoping review explores a topic. The researcher tries to identify the main concepts, theories, and evidence, as well as gaps in the current research.
Sometimes scoping reviews are an exploratory preparation step for a systematic review, and sometimes they are a standalone project.
A systematic review is a good choice of review if you want to answer a question about the effectiveness of an intervention , such as a medical treatment.
To conduct a systematic review, you’ll need the following:
A systematic review has many pros .
Systematic reviews also have a few cons .
The 7 steps for conducting a systematic review are explained with an example.
Formulating the research question is probably the most important step of a systematic review. A clear research question will:
A good research question for a systematic review has four components, which you can remember with the acronym PICO :
You can rearrange these four components to write your research question:
Sometimes, you may want to include a fifth component, the type of study design . In this case, the acronym is PICOT .
Their research question was:
A protocol is a document that contains your research plan for the systematic review. This is an important step because having a plan allows you to work more efficiently and reduces bias.
Your protocol should include the following components:
If you’re a professional seeking to publish your review, it’s a good idea to bring together an advisory committee . This is a group of about six people who have experience in the topic you’re researching. They can help you make decisions about your protocol.
It’s highly recommended to register your protocol. Registering your protocol means submitting it to a database such as PROSPERO or ClinicalTrials.gov .
Searching for relevant studies is the most time-consuming step of a systematic review.
To reduce bias, it’s important to search for relevant studies very thoroughly. Your strategy will depend on your field and your research question, but sources generally fall into these four categories:
At this stage of your review, you won’t read the articles yet. Simply save any potentially relevant citations using bibliographic software, such as Scribbr’s APA or MLA Generator .
Applying the selection criteria is a three-person job. Two of you will independently read the studies and decide which to include in your review based on the selection criteria you established in your protocol . The third person’s job is to break any ties.
To increase inter-rater reliability , ensure that everyone thoroughly understands the selection criteria before you begin.
If you’re writing a systematic review as a student for an assignment, you might not have a team. In this case, you’ll have to apply the selection criteria on your own; you can mention this as a limitation in your paper’s discussion.
You should apply the selection criteria in two phases:
It’s very important to keep a meticulous record of why you included or excluded each article. When the selection process is complete, you can summarize what you did using a PRISMA flow diagram .
Next, Boyle and colleagues found the full texts for each of the remaining studies. Boyle and Tang read through the articles to decide if any more studies needed to be excluded based on the selection criteria.
When Boyle and Tang disagreed about whether a study should be excluded, they discussed it with Varigos until the three researchers came to an agreement.
Extracting the data means collecting information from the selected studies in a systematic way. There are two types of information you need to collect from each study:
You should collect this information using forms. You can find sample forms in The Registry of Methods and Tools for Evidence-Informed Decision Making and the Grading of Recommendations, Assessment, Development and Evaluations Working Group .
Extracting the data is also a three-person job. Two people should do this step independently, and the third person will resolve any disagreements.
They also collected data about possible sources of bias, such as how the study participants were randomized into the control and treatment groups.
Synthesizing the data means bringing together the information you collected into a single, cohesive story. There are two main approaches to synthesizing the data:
Generally, you should use both approaches together whenever possible. If you don’t have enough data, or the data from different studies aren’t comparable, then you can take just a narrative approach. However, you should justify why a quantitative approach wasn’t possible.
Boyle and colleagues also divided the studies into subgroups, such as studies about babies, children, and adults, and analyzed the effect sizes within each group.
The purpose of writing a systematic review article is to share the answer to your research question and explain how you arrived at this answer.
Your article should include the following sections:
To verify that your report includes everything it needs, you can use the PRISMA checklist .
Once your report is written, you can publish it in a systematic review database, such as the Cochrane Database of Systematic Reviews , and/or in a peer-reviewed journal.
In their report, Boyle and colleagues concluded that probiotics cannot be recommended for reducing eczema symptoms or improving quality of life in patients with eczema. Note Generative AI tools like ChatGPT can be useful at various stages of the writing and research process and can help you to write your systematic review. However, we strongly advise against trying to pass AI-generated text off as your own work.
If you want to know more about statistics , methodology , or research bias , make sure to check out some of our other articles with explanations and examples.
Research bias
A literature review is a survey of scholarly sources (such as books, journal articles, and theses) related to a specific topic or research question .
It is often written as part of a thesis, dissertation , or research paper , in order to situate your work in relation to existing knowledge.
A literature review is a survey of credible sources on a topic, often used in dissertations , theses, and research papers . Literature reviews give an overview of knowledge on a subject, helping you identify relevant theories and methods, as well as gaps in existing research. Literature reviews are set up similarly to other academic texts , with an introduction , a main body, and a conclusion .
An annotated bibliography is a list of source references that has a short description (called an annotation ) for each of the sources. It is often assigned as part of the research process for a paper .
A systematic review is secondary research because it uses existing research. You don’t collect new data yourself.
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Turney, S. (2023, November 20). Systematic Review | Definition, Example & Guide. Scribbr. Retrieved August 26, 2024, from https://www.scribbr.com/methodology/systematic-review/
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A major issue for socioeconomic development, especially in developing countries, is income inequality. In terms of the financial sector and income inequality, the Kuznets curve is expanded upon by the financial Kuznets curve (FKC). Using a panel dataset of eight EAGLE nations from 1991 to 2019, the current study aims to empirically investigate the existence of non-linearity between financial systems (financial development, financial institutions, and financial markets) and income inequality. The financial development index, the financial institutions index, and the financial markets index are the three additional components that make up finance. The feasible generalized least squares (FGLS) and panel-corrected standard errors (PCSE) estimators have been used for robustness assessments because of the cross-sectional dependency in the panel dataset. The empirical findings confirmed that there is an inverted U-shaped relationship in EAGLE nations between financial development, financial institutions, financial markets, and income inequality. This suggests that after a certain level is achieved, income inequality may decline. It may rise in the early stages of financial development, financial institutions, and financial markets. Moreover, our empirical results showed that while GDP growth, school enrollment, and trade openness reduce income inequality, factors like unemployment, inflation, population growth, and age dependency increase it. According to the study, income inequality can be reduced by the current government's prudent socioeconomic policies and advanced financial systems.
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The data supporting the findings of this study are available from the corresponding author upon reasonable request.
Income inequality is measured by the Gini coefficient from the Standardized World Income Inequality Database (SWIID).
Financial development data has been taken from International Monetary Fund (IMF).
To avoid making assumptions about the significance of certain indicators in gauging FD and its sub-indicators, this data uses a statistical technique called principal components analysis (PCA). To create a composite indicator that incorporates as much of the data shared by all the collinear individual indicators as feasible, PCA joins together the collinear individual indicators. The underlying series' PCA squared factor loadings (so that their sum adds up to 1) are used to build sub-indices as weighted averages of the normalized series. The coefficients known as factor loadings connect the observed variables to the factors or major components. The percentage of the indicator's total unit variation that is explained by a factor is shown by the square of the factor loadings.
Abosedra, S., Shahbaz, M., & Nawaz, K. (2016). Modelling causality between financial deepening and poverty reduction in Egypt. Social Indicators Research, 126 , 955–969. https://doi.org/10.1007/s11205-015-0929-2
Article Google Scholar
Aghion, P., & Bolton, P. (1997). A theory of trickle-down growth and development. The review of economic studies, 64 (2), 151–172. https://doi.org/10.2307/2971707
Akan, Y., Köksel, B., & Destek, M. A. (2017). The financial Kuznets curve in European Union. In EconWorld2017 Rome Proceedings , pp. 25–27.
Ang, J. B. (2010). Finance and inequality: the case of India. Southern Economic Journal, 76 (3), 738–761. https://doi.org/10.4284/sej.2010.76.3.738
Arora, R. U. (2012). Finance and inequality: a study of Indian states. Applied Economics , 44 (34), 4527–4538. https://doi.org/10.1080/00036846.2011.597736
Baiardi, D., & Morana, C. (2016). The financial Kuznets curve: Evidence for the euro area. Journal of Empirical Finance, 39 (part B), 265–269. https://doi.org/10.1016/j.jempfin.2016.08.003
Baiardi, D., & Morana, C. (2018). Financial development and income distribution inequality in the euro area. Economic Modelling, 70 , 40–55. https://doi.org/10.1016/j.econmod.2017.10.008
Baloch, M. A., Ozturk, I., Bekun, F. V., & Khan, D. (2021). Modelling the dynamic linkage between financial development, energy innovation, and environmental quality: Does globalization matter? Business Strategy and the Environment, 30 (1), 176–184. https://doi.org/10.1002/bse.2615
Banerjee, A. V., & Newman, A. F. (1993). Occupational choice and the process of development. Journal of Political Economy, 101 (2), 274–298. https://doi.org/10.1086/261876
Batuo, M. E., Guidi, F., & Mlambo, K. (2010). Financial development and income inequality: Evidence from African Countries. MPRA Paper No . 25658. Available online at: https://mpra.ub.uni-muenchen.de/25658/ . Accessed 11 May 2020.
Beck, T., Demirgüç-Kunt, A., & Levine, R. (2007). Finance, inequality and the poor. Journal of Economic Growth, 12 , 27–49. https://doi.org/10.1007/s10887-007-9010-6
Behrman, J. R., Birdsall, N., & Székely, M. (2007). Economic policy changes and wage differentials in Latin America. Economic Development and Cultural Change , 56 (1), 57–97. https://doi.org/10.1086/520556
Ben Belgacem, S., Younsi, M., Bechtini, M., Alzuman, A., & Khalfaoui, R. (2024). Do Financial Development, Institutional Quality and Natural Resources Matter the Outward FDI of G7 Countries? A Panel Gravity Model Approach. Sustainability, 16 (6), 2237. https://doi.org/10.3390/su16062237
Bittencourt, M. (2010). Financial development and inequality: Brazil 1985–1994. Economic Change Restructuring, 43 , 113–130. https://doi.org/10.1007/s10644-009-9080-x
Brei, M., Ferri, G., & Gambacorta, L. (2023). Financial structure and income inequality. Journal of International Money and Finance, 131 , 102807. https://doi.org/10.1016/j.jimonfin.2023.102807
Breusch, T. S., & Pagan, A. R. (1980). The Lagrange multiplier test and its applications to model specification in econometrics. Review of Economic Studies, 47 (1), 239–253. https://doi.org/10.2307/2297111
Canavire-Bacarreza, G., & Rioja, F. (2009). Financial development and the distribution of income in Latin America and the Caribbean. Well-Being and Social Policy , 5 , 1–18.
Chiu, Y.-B., & Lee, C.-C. (2019). Financial development, income inequality, and country risk. Journal of International Money Finance, 93 , 1–18. https://doi.org/10.1016/j.jimonfin.2019.01.001
Cihak, M., Demirguc-Kunt, A., Feyen, E., & Levine, R. (2012). Benchmarking financial systems around the world. Policy Research Working Paper No. 6175 . World Bank. http://hdl.handle.net/10986/12031 . Accessed 13 May 2020.
Claessens, S. (2006). Access to financial services: A review of the issues and public policy objectives. The World Bank Research Observer , 21 (2), 207–240. https://doi.org/10.1093/wbro/lkl004
Clarke, G. R., Xu, L. C., & Zou, H.-F. (2006). Finance and income inequality: what do the data tell us? Southern Economic Journal, 72 (3), 578–596. https://doi.org/10.1002/j.2325-8012.2006.tb00721.x
Cong Nguyen, T., Ngoc Vu, T., Hong Vo, D., & Thi-Thieu Ha, D. (2019). Financial development and income inequality in emerging markets: a new approach. Journal of Risk and Financial Management, 12 (4), 173. https://doi.org/10.3390/jrfm12040173
Cysne, R. P. (2009). On the Positive Correlation between Income Inequality and Unemployment. The Review of Economics Statistics, 91 (1), 218–226. https://doi.org/10.1162/rest.91.1.218
Destek, M. A., Sinha, A., & Sarkodie, S. A. (2020). The relationship between financial development and income inequality in Turkey. Journal of Economic Structures, 9 (11), 1–14. https://doi.org/10.1186/s40008-020-0187-6
Dollar, D., & Kraay, A. (2002). Growth is good for the poor. Journal of Economic Growth , 7 , 195–225. https://doi.org/10.1023/A:1020139631000
Dorn, F., & Fuest, C. (2021). Trade openness and income inequality: New empirical evidence. Economic Inquiry, 60 (1), 202–223. https://doi.org/10.1111/ecin.13018
Ejemeyovwi, J. O., Osabuohien, E. S., & Bowale, E. I. (2021). ICT adoption, innovation and financial development in a digital world: An empirical analysis from Africa. Transnational Corporations Review, 13 (1), 16–31. https://doi.org/10.1080/19186444.2020.1851124
Franco, C., & Gerussi, E. (2013). Trade, foreign direct investments (FDI) and income inequality: empirical evidence from transition countries. The Journal of International Trade & Economic Development, 22 (8), 1131–1160. https://doi.org/10.1080/09638199.2011.647048
Galor, O., & Zeira, J. (1993). Income distribution and macroeconomics. The Review of Economic Studies, 60 (1), 35–52. https://doi.org/10.2307/2297811
Greenwood, J., & Jovanovic, B. (1990). Financial Development, Growth, and the Distribution of Income. Journal of Political Economy, 98 (5, Part 1), 1076–1107. https://doi.org/10.1086/261720
Hamori, S., & Hashiguchi, Y. (2012). The effect of financial deepening on inequality: Some international evidence. Journal of Asian Economics, 23 (4), 353–359. https://doi.org/10.1016/j.asieco.2011.12.001
Hurd, M. (1979). Estimation in truncated samples when there is heteroscedasticity. Journal of Econometrics, 11 (2–3), 247–258. https://doi.org/10.1016/0304-4076(79)90039-3
Islam, M. A., Khan, M. A., Popp, J., Sroka, W., & Oláh, J. (2020). Financial development and foreign direct investment—The moderating role of quality institutions. Sustainability, 12 (9), 3556. https://doi.org/10.3390/su12093556
Jalil, A., & Feridun, M. (2011). Long-run relationship between income inequality and financial development in China. Journal of the Asia Pacific Economy, 16 (2), 202–214. https://doi.org/10.1080/13547860.2011.564745
Jarque, C. M., & Bera, A. K. (1980). Efficient tests for normality, homoscedasticity and serial independence of regression residuals. Econometrics Letters, 6 (3), 255–259. https://doi.org/10.1016/0165-1765(80)90024-5
Jauch, S., & Watzka, S. (2016). Financial development and income inequality: a panel data approach. Empirical Economics, 51 , 291–314. https://doi.org/10.1007/s00181-015-1008-x
Kaidi, N., & Sami, M. (2016). Financial Development and Income Inequality: The Linear versus the Nonlinear Hypothesis. Economics Bulletin, 36 (2), 609–626.
Google Scholar
Kanbur, R., & Zhang, X. (2005). Fifty years of regional inequality in China: a journey through central planning, reform, and openness. Review of development Economics, 9 (1), 87–106. https://doi.org/10.1111/j.1467-9361.2005.00265.x
Kim, D.-H., & Lin, S.-C. (2011). Nonlinearity in the financial development–income inequality nexus. Journal of Comparative Economics, 39 (3), 310–325. https://doi.org/10.1016/j.jce.2011.07.002
Kmenta, J. (1986). Latent Variables. Elements of Econometrics (2nd ed., pp. 581–587). Macmillan.
Koenker, R. (1981). A note on studentizing a test for heteroscedasticity. Journal of Econometrics, 17 (1), 107–112. https://doi.org/10.1016/0304-4076(81)90062-2
Kuznets, S. (1955). Economic growth and inequality income. American Economic Review, 45( (1), 1–28. http://www.jstor.org/stable/1811581 .
Laktionova, O., Koval, V., Savina, N., & Gechbaia, B. (2021). The Models of Matching Financial Development and Human Capital in National Economy. Bulletin of the Georgian National Academy of Sciences, 15 (2), 177–184.
Law, S. H., & Tan, H. B. (2009). The role of financial development on income inequality in Malaysia. Journal of Economic Development, 34 ((2)), 153–168. https://jed.cau.ac.kr/archives/34-2/34-2-8.pdf .
Levine, R. (2021). Finance, Growth, and Inequality. IMF Working Papers , 2021 (164), A001. Retrieved from https://doi.org/10.5089/9781513583365.001.A001
Li, H., Squire, L., & Zou, H.-f. (1998). Explaining international and intertemporal variations in income inequality. The Economic Journal , 108 (446), 26–43. https://doi.org/10.1111/1468-0297.00271
Liang, Z. (2006). Financial development and income distribution: a system GMM panel analysis with application to urban China. Journal of Economic Development, 31 (2), 1–21. https://sid.ir/paper/595709/en .
Ling-zheng, Y., & Xia-hai, W. (2012). Has Financial Development Worsened Income Inequality in China? Evidence from Threshold Regression Model. Journal of Finance and Economics, 38 (3), 106–115.
Mahesh, M. (2011). The effect of trade openness on income inequality: evidence from developing countries. Available at SSRN . https://doi.org/10.2139/ssrn.2736721
Mbona, N. (2022). Impacts of Overall Financial Development, Access and Depth on Income Inequality. Economies, 10 (5), 118. https://doi.org/10.3390/economies10050118
Meschi, E., & Vivarelli, M. (2009). Trade and income inequality in developing countries. World Development, 37 (2), 287–302. https://doi.org/10.1016/j.worlddev.2008.06.002
Mignamissi, D. (2021). Digital divide and financial development in Africa. Telecommunications Policy, 45 (9), 102199. https://doi.org/10.1016/j.telpol.2021.102199
Miled, K. B. H., Younsi, M., & Landolsi, M. (2022). Does microfinance program innovation reduce income inequality? Cross-country and panel data analysis. Journal of Innovation and Entrepreneurship, 11 (7), 1–15. https://doi.org/10.1186/s13731-022-00195-7
Mookherjee, D., & Ray, D. (2003). Persistent inequality. The Review of Economic Studies, 70 (2), 369–393.
Nguyen, C. P., & Su, T. D. (2021). Financing the economy: The multidimensional influences of financial development on economic complexity. Journal of International Development, 33 (4), 644–684. https://doi.org/10.1002/jid.3541
Nikoloski, Z. (2013). Financial sector development and inequality: is there a financial Kuznets curve? Journal of International Development, 25 (7), 897–911. https://doi.org/10.1002/jid.2843
Odhiambo, N. M. (2009). Finance-growth-poverty nexus in South Africa: A dynamic causality linkage. The Journal of Socio-Economics, 38 (2), 320–325. https://doi.org/10.1016/j.socec.2008.12.006
Perotti, R. (1996). Growth, income distribution, and democracy: What the data say. Journal of Economic Growth , 1 , 149–187. https://doi.org/10.1007/BF00138861
Pesaran, M. H. (2004). General Diagnostic Tests for Cross Section Dependence in Panels. Working Paper 0435. Faculty of Economics, University of Cambridge
Rajan, R., & Zingales, L. (2014). Saving capitalism from the capitalists: Unleashing the power of financial markets to create wealth and spread opportunity . HarperCollins Publishers India
Rehman, H. U., Khan, S., & Ahmed, I. (2008). Income distribution, growth and financial development: A cross countries analysis. Pakistan Economic Social Review, 46 (1), 1–16.
Roser, M., & Cuaresma, J. C. (2016). Why is income inequality increasing in the developed world? Review of Income and Wealth, 62 (1), 1–27. https://doi.org/10.1111/roiw.12153
Sahay, R., Čihák, M., N’Diaye, P., & Barajas, A. (2015). Rethinking financial deepening: Stability and growth in emerging markets. Revista de Economía Institutional, 17 (33), 73–107. https://doi.org/10.18601/01245996.17n33.04
Sebastian, J., & Sebastian, W. (2011). Financial development and income inequality. CESifo working paper: Fiscal Policy, Macroeconomics and Growth, No. 3687
Sethi, P., Bhattacharjee, S., Chakrabarti, D., & Tiwari, C. (2021). The impact of globalization and financial development on India’s income inequality. Journal of Policy Modeling, 43 (3), 639–656. https://doi.org/10.1016/j.jpolmod.2021.01.002
Seven, Ü. (2022). Finance, talent and income inequality: Cross-country evidence. Borsa Istanbul Review, 22 (1), 57–68. https://doi.org/10.1016/j.bir.2021.01.003
Seven, U., & Coskun, Y. (2016). Does financial development reduce income inequality and poverty? Evidence from emerging countries. Emerging Markets Review, 26 , 34–63. https://doi.org/10.1016/j.ememar.2016.02.002
Shahbaz, M., Bhattacharya, M., & Mahalik, M. K. (2017). Finance and income inequality in Kazakhstan: Evidence since transition with policy suggestions. Applied Economics, 49 (52), 5337–5351. https://doi.org/10.1080/00036846.2017.1305095
Shahbaz, M., & Islam, F. (2011). Financial development and income inequality in Pakistan: An application of ARDL approach. Journal of Economic Development, 36 (1), 35–58. https://doi.org/10.35866/caujed.2011.36.1.003
Shahbaz, M., Loganathan, N., Tiwari, A. K., & Sherafatian-Jahromi, R. (2015). Financial development and income inequality: Is there any financial Kuznets curve in Iran? Social Indicators Research, 124 , 357–382. https://doi.org/10.1007/s11205-014-0801-9
Solt, F. (2020). Measuring Income Inequality Across Countries and Over Time: The Standardized World Income Inequality Database. Social Science Quarterly, 101 (3), 1183–1199. https://doi.org/10.1111/SSQU.12795
Stock, J. H., & Watson, M. W. (1988). Testing for common trends. Journal of the American Statistical Association, 83 (404), 1097–1107. https://doi.org/10.1080/01621459.1988.10478707
Svirydzenka, K. (2016). Introducing a New Broad-Based Index of Financial Development, International Monetary Fund. https://www.imf.org/en/Publications/WP/Issues/2016/12/31/Introducing-a-New-Broad-based-Index-of-Financial-Development-43621 . (Accessed 12 July 2023)
Tan, H.-B., & Law, S.-H. (2012). Nonlinear dynamics of the finance-inequality nexus in developing countries. The Journal of Economic Inequality, 10 , 551–563. https://doi.org/10.1007/s10888-011-9174-3
Tiwari, A. K., Shahbaz, M., & Islam, F. (2013). Does financial development increase rural-urban income inequality? Cointegration analysis in the case of Indian economy. International Journal of Social Economics, 40 (2), 151–168. https://doi.org/10.1108/03068291311283616
Tsui, K. Y. (2007). Forces shaping China’s interprovincial inequality. Review of Income and Wealth, 53 (1), 60–92. https://doi.org/10.1111/j.1475-4991.2007.00218.x
Wan, G., & Zhou, Z. (2005). Income inequality in rural China: Regression-based decomposition using household data. Review of Development Economics, 9 (1), 107–120. https://doi.org/10.1111/j.1467-9361.2005.00266.x
Westley, G. D. (2001). Can financial market policies reduce income inequality? Inter-American Development Bank.
Book Google Scholar
Wooldridge, J. M. (2002). Econometric Analysis of Cross Section and Panel Data . MIT Press.
Younsi, M., Bechtini, M., & Lassoued, M. (2022). Causal Relationship Between Financial Development, Economic Growth, and Income Inequality: Panel Data Evidence from Asian and North African Countries. In: Mugova, S., Akande, J.O., Olarewaju, O.M. (eds) Corporate Finance and Financial Development. Contributions to Finance and Accounting . Springer, Cham. https://doi.org/10.1007/978-3-031-04980-4_8
Younsi, M., & Bechtini, M. (2023). Financing Health Systems in Developing Countries: the Role of Government Spending and Taxation. Journal of the Knowledge Economy . https://doi.org/10.1007/s13132-023-01623-z
Younsi, M., & Bechtini, M. (2020). Economic growth, financial development, and income inequality in BRICS countries: does Kuznets’ inverted U-shaped curve exist? Journal of the Knowledge Economy, 11 , 721–742. https://doi.org/10.1007/s13132-018-0569-2
Younsi, M., & Chakroun, M. (2020). The conditional effect of income distribution on mortality risk of men in Tunisia: Poverty effect or wealth effect? The Social Science Journal, 57 (1), 101–114. https://doi.org/10.1016/j.soscij.2019.01.002
Younsi, M., Khemili, H., & Bechtini, M. (2019). Does foreign aid help alleviate income inequality? New evidence from African Countries. International Journal of Social Economics, 46 (4), 549–561. https://doi.org/10.1108/IJSE-06-2018-0319
Zungu, L. T., Greyling, L., & Kaseeram, I. (2022). Financial development and income inequality: a nonlinear econometric analysis of 21 African countries, 1990–2019. Cogent Economics & Finance, 10 (1), 1–20. https://doi.org/10.1080/23322039.2022.2137988
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The authors would like to thank the Deanship of Scientific Research at Shaqra University for supporting this work. We also express our thanks to the Editor-in-Chief, the Associate Editor, and the two anonymous referees for their helpful comments and suggestions.
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Department of Economics, University of Sargodha, Sargodha, Pakistan
Shahzad Mushtaq & Zoofshan Sagheer
Department of Business Administration, College of Science and Humanities, Shaqra University, 11911, Al-Dawadmi, Saudi Arabia
Moheddine Younsi
Department of Economics, Higher Institute of Finance and Taxation, University of Sousse, 4054, Sousse, Tunisia
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S.M. and M.Y. contributed to the study design. S.M. analysed the data, and M.Y. and Z.S. verified the results. M.Y and S.M. drafted the first version of the manuscript, and Z.S. edited the manuscript. All authors read and approved the final manuscript.
Correspondence to Moheddine Younsi .
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Mushtaq, S., Younsi, M. & Sagheer, Z. Non-linearity Between Finance and Income Inequality: A Panel Data Analysis for EAGLE Countries. J Knowl Econ (2024). https://doi.org/10.1007/s13132-024-02302-3
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DOI : https://doi.org/10.1007/s13132-024-02302-3
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This is why the literature review as a research method is more relevant than ever. Traditional literature reviews often lack thoroughness and rigor and are conducted ad hoc, rather than following a specific methodology. Therefore, questions can be raised about the quality and trustworthiness of these types of reviews.
A Review of the Theoretical Literature" (Theoretical literature review about the development of economic migration theory from the 1950s to today.) Example literature review #2: "Literature review as a research methodology: An overview and guidelines" ( Methodological literature review about interdisciplinary knowledge acquisition and ...
the literature review involves activities such as identi-fying, recording, understanding, meaning-making, and transmitting information. Indeed, the literature review process is actualized through data collection. In its opti-mal form, the literature review represents a formal data collection process wherein information is gathered in a
A literature review is an integral part of both research and education. It is the first and foremost step in research. There are different types of literature reviews with varying degrees of rigor in methodology, ranging from scoping reviews to systematic reviews.
What kinds of literature reviews are written? Narrative review: The purpose of this type of review is to describe the current state of the research on a specific topic/research and to offer a critical analysis of the literature reviewed. Studies are grouped by research/theoretical categories, and themes and trends, strengths and weakness, and gaps are identified.
A literature review is an integrated analysis-- not just a summary-- of scholarly writings and other relevant evidence related directly to your research question.That is, it represents a synthesis of the evidence that provides background information on your topic and shows a association between the evidence and your research question.
Literature reviews allow scientists to argue that they are expanding current. expertise - improving on what already exists and filling the gaps that remain. This paper demonstrates the literatu ...
9.3. Types of Review Articles and Brief Illustrations. EHealth researchers have at their disposal a number of approaches and methods for making sense out of existing literature, all with the purpose of casting current research findings into historical contexts or explaining contradictions that might exist among a set of primary research studies conducted on a particular topic.
Overview. A Systematic Literature Review (SLR) is a research methodology to collect, identify, and critically analyze the available research studies (e.g., articles, conference proceedings, books, dissertations) through a systematic procedure .An SLR updates the reader with current literature about a subject .The goal is to review critical points of current knowledge on a topic about research ...
Reviewing literature to situate it in a research tradition is an essential step in the process of planning and designing research. A literature review shows the reader where your research is coming from, and how it is situated in relation to prior scholarship. Attention is necessarily given to literature about the research problem, which places ...
A typology of literature reviews. A methodological review is a type of systematic secondary research (i.e., research synthesis) which focuses on summarising the state-of-the-art methodological practices of research in a substantive field or topic" (Chong et al, 2021).
Literature Review and Research Design by Dave Harris This book looks at literature review in the process of research design, and how to develop a research practice that will build skills in reading and writing about research literature--skills that remain valuable in both academic and professional careers. Literature review is approached as a process of engaging with the discourse of scholarly ...
A formal literature review is an evidence-based, in-depth analysis of a subject. There are many reasons for writing one and these will influence the length and style of your review, but in essence a literature review is a critical appraisal of the current collective knowledge on a subject. Rather than just being an exhaustive list of all that ...
Sage Research Methods community highlighted this useful collection with a series of interviews and related resources in 2023. Review research is an broad term that describes various types of review articles.Kunisch et al. (2023) define it as . a class of research inquiries that employ scientific methods to analyze and synthesize prior research to develop new knowledge for academia, practice ...
Literature Review is a comprehensive survey of the works published in a particular field of study or line of research, usually over a specific period of time, in the form of an in-depth, critical bibliographic essay or annotated list in which attention is drawn to the most significant works. Also, we can define a literature review as the ...
A literature review is a critical analysis and synthesis of existing research on a particular topic. It provides an overview of the current state of knowledge, identifies gaps, and highlights key findings in the literature. 1 The purpose of a literature review is to situate your own research within the context of existing scholarship ...
One literature review type whose methodology has yet to be elucidated is the state-of-the-art (SotA) review. If medical educators are to harness SotA reviews to generate knowledge syntheses, we must understand and articulate the paradigmatic roots of, and methods for, conducting SotA reviews. We reviewed 940 articles published between 2014 ...
Literature reviews establish the foundation of academic inquires. However, in the planning field, we lack rigorous systematic reviews. In this article, through a systematic search on the methodology of literature review, we categorize a typology of literature reviews, discuss steps in conducting a systematic literature review, and provide suggestions on how to enhance rigor in literature ...
A literature review is a review and synthesis of existing research on a topic or research question. A literature review is meant to analyze the scholarly literature, make connections across writings and identify strengths, weaknesses, trends, and missing conversations. A literature review should address different aspects of a topic as it ...
A literature review involves researching, reading, analyzing, evaluating, and summarizing scholarly literature (typically journals and articles) about a specific topic. The results of a literature review may be an entire report or article OR may be part of a article, thesis, dissertation, or grant proposal.
A literature or narrative review is a comprehensive review and analysis of the published literature on a specific topic or research question. The literature that is reviewed contains: books, articles, academic articles, conference proceedings, association papers, and dissertations. It contains the most pertinent studies and points to important ...
A systematic review is a type of review that uses repeatable methods to find, select, and synthesize all available evidence. It answers a clearly formulated research question and explicitly states the methods used to arrive at the answer. Example: Systematic review. In 2008, Dr. Robert Boyle and his colleagues published a systematic review in ...
Abstract This meta-analysis examined the validity of an alternative to traditional assessments called the Wonderlic which is a brief measure of general mental ability.
Design/methodology/approach: A multi-staged structured literature review approach to search for the two broad themes, accounting and BPM, supported by NVivo (to manage the papers and the coding and analysis processes) was designed and followed. Findings: The paper confirms the dearth of work that ties the two disciplines, despite the synergetic ...
The "Literature Review" section presents the existing literature on the linear and nonlinear connections between FD and income inequality. The "Data and Methodology" section presents the data sources, model specifications, and estimation methods.
Review Literature. Over the past three decades, there have been fruitless discussions about the impact of corrective feedback (hereafter, CF) on grammatical accuracy in L2 writing classes. ... it was thought that construct validity could be assessed at various stages of the data collection process. As a result, construct validity can be said to ...