Bibliometric analysis of research trends and networks in carbon tax studies: Insights into environmental and economic policy implications

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Carbon taxes are increasingly recognized as a critical tool in mitigating climate change by reducing carbon emissions. This study analyzes research trends in carbon tax studies using bibliometric techniques and social network analysis to explore their environmental and economic impacts and policy implications. By analyzing 922 documents from 308 sources published between 1968 and 2024, the study identifies key topics, emerging trends, and collaboration patterns among researchers. The results show a significant increase in carbon tax publications and citations, particularly from 2000 to 2019, peaking around 2017–2019, followed by a decline after 2021. The most frequently studied topics include carbon tax effects on emissions reduction, economic balance, and environmental sustainability. Social network analysis reveals influential researchers and institutions driving the discourse on carbon taxes, highlighting the importance of interdisciplinary collaboration in shaping effective policies. These findings provide insights into the evolution of carbon tax policies and underscore the need for continued research on specialized themes such as the role of carbon taxes in supply chain management, social equity, and energy policy.

Acknowledgments
The authors would like to express their sincere gratitude to the Rector and the Dean of the Faculty of Economics and Business, Hasanuddin University for their unwavering support and invaluable assistance in this analysis. Their commitment to advancing academic research and community service has been instrumental in completing this study.

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    • Figure 1. Data filtering strategy through PRISMA protocol
    • Figure 2. Carbon tax research trends (1968–2024)
    • Figure 3. Network visualization of keywords in carbon tax research literature
    • Figure 4. Network visualization of environmental impacts and effectiveness of carbon tax in reducing emissions
    • Figure 5. Network visualization of economic impacts and distributional effects in carbon tax research
    • Figure 6. Network visualization of policy implications in carbon tax research
    • Figure 7. Thematic map on carbon tax research
    • Figure 8. Thematic evolution of carbon tax research
    • Table 1. Statistical description of carbon tax research
    • Table 2. Keyword occurrences in carbon tax research literature
    • Table 3. Clustering and centrality measures of key nodes in carbon tax research network (environmental impact)
    • Table 4. Clustering and centrality measures of key nodes in carbon tax research network (economic impact)
    • Table 5. Clustering and centrality measures of key nodes in policy implications of carbon tax research
    • Conceptualization
      Andi Kusumawati
    • Formal Analysis
      Andi Kusumawati, Suhanda Suhanda, Darmawati, Andi Iqra Pradipta Natsir
    • Funding acquisition
      Andi Kusumawati
    • Methodology
      Andi Kusumawati, Darmawati
    • Supervision
      Andi Kusumawati
    • Validation
      Andi Kusumawati, Suhanda Suhanda
    • Writing – original draft
      Andi Kusumawati, Suhanda Suhanda, Darmawati, Andi Iqra Pradipta Natsir, Indira Syakira Kirana Juanda
    • Writing – review & editing
      Andi Kusumawati, Suhanda Suhanda, Darmawati, Andi Iqra Pradipta Natsir, Indira Syakira Kirana Juanda
    • Investigation
      Suhanda Suhanda, Darmawati, Andi Iqra Pradipta Natsir
    • Resources
      Suhanda Suhanda, Darmawati, Andi Iqra Pradipta Natsir, Indira Syakira Kirana Juanda
    • Data curation
      Darmawati
    • Visualization
      Darmawati, Indira Syakira Kirana Juanda
    • Project administration
      Andi Iqra Pradipta Natsir, Indira Syakira Kirana Juanda
    • Software
      Indira Syakira Kirana Juanda