What topics are investigated in circular economy research? A co-word analysis using hierarchical clustering

Authors

DOI:

https://doi.org/10.47909/ijsmc.1623

Keywords:

circular economy, co-word analysis, bibliometrics, hierarchical clustering, sustainable development, environmental economics

Abstract

Objective. We analyzed the most researched topics related to the circular economy. To this end, we used a bibliometric approach, generating thematic maps that group the most used terms in the scientific literature.

Design/Methodology/Approach. The present study focused on hierarchical clustering analysis to identify and understand interrelated themes in circular economy research. Adopting Ward's method, the analysis was performed without predetermining the number of groups. The data set was extracted from the Scopus database. Author keywords and keywords plus were used for the study.

Results/Discussion. A hierarchical clustering analysis applied to the corpus of circular economy terms has revealed five main groups: (1) technological innovation and strategic planning, (2) adaptation and resilience in industrial processes, (3) reuse and advanced manufacturing, (4) safety and automation in the circular economy, and (5) material science and chemical sustainability. The interrelationship between the clusters identified in the analysis reflects an integrated thematic ecosystem within the circular economy, with each cluster complementing the others to address multifaceted challenges. Cluster 1, focused on the “circular economy” and “sustainable development,” is the strategic core connecting all clusters' technological and policy approaches. This cluster establishes direct links with cluster 3, where concepts such as “recycling” and “additive manufacturing” are essential to materialize the reuse strategies proposed. Cluster 2, focused on adaptation and resilience, establishes a critical connection with cluster 4 since automation and safety require adaptive models to manage dynamic processes. In addition, cluster 5, focused on sustainable materials and chemical processes, complements the objectives of cluster 1 by providing innovative solutions to improve recyclability and manage waste such as plastic waste and carbon dioxide.

Conclusions. The synergies between the clusters show that progress toward a circular model depends on integrating multiple dimensions, from policy and technology strategies to advances in materials and industrial processes.

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Iberoamerican Journal of Science Measurement and Communication

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Published

2025-01-03

How to Cite

Sánchez, J. L. A., La Rosa, P. E. R., Palma, D. F. M., Campos, G. A. C., & Poma, Y. E. M. (2025). What topics are investigated in circular economy research? A co-word analysis using hierarchical clustering. Iberoamerican Journal of Science Measurement and Communication, 5(1), 1–11. https://doi.org/10.47909/ijsmc.1623

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Vol. 5 No. 1 (2025): Iberoamerican Journal of Science Measurement and Communication

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Copyright (c) 2025 José Luis Ausejo Sánchez, Patricia Elena Ramos La Rosa, Damaris Faviola Medina Palma, Gleny Amelia Ching Campos, Yolanda Emperatriz Maguiña Poma

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