Figure 2
The network nodes are represented as colored circles, with author names and publication years displayed in parentheses. Thin connecting lines represent citation relationships. The network is arranged horizontally with four visible color-coded clusters. On the left side, a blue cluster includes nodes labeled “wu (2019)”, “bird (2020)”, “fontana (2023)”, “namibia (2014)”, and “collins (2007)”. These nodes are connected by thin blue lines, forming a small leftmost grouping. The node “collins (2007)” connects upward toward the central yellow cluster. Below and slightly right of the blue cluster is a green cluster centered around “ding (2015)” and “sterman (2014b)”. Other connected green nodes include “hidayat (2014)”, “sadowski (2015)”, “celino (2011)”, “konig (2017)”, and “baddache (2013)”. The green nodes are interconnected and positioned slightly lower than the blue cluster. Above the center, a yellow cluster includes “de vries (2017)”, “bals (2019)”, “lee (2021)”, and “abdul rahim (2022)”. These yellow nodes are linked with thin yellow lines. The node “lee (2021)” connects downward toward the red cluster, acting as a bridge between clusters. On the right side, a red cluster is centered around “perey (2018)”. Closely connected red nodes include “li (2021)”, “davies (2022)”, “hale (2021)”, “agrawal (2023)”, “furlan (2024)”, “ahamer (2013)”, and “purdy (2018)”. These nodes form a dense grouping with multiple interconnections. A V O S viewer logo appears in the lower-left corner.Bibliographic coupling. Source: Authors’ own elaboration