Figure 1

The rising interest of academic literature towards (de)centralization. (a) Fraction of papers mentioning (de)centralization in the Semantic Scholar corpus. (b) Fraction of authors mentioning (de)centralization in the Semantic Scholar corpus. Both fractions have been steadily increasing since the 1950s, showing growing interest in the topic. (c) Number of papers in the clusters at the 3rd level of the hierarchy in each year. Clusters are ordered respecting the hierarchical network on the left, in which node and link sizes are proportional to the total number of papers in the related cluster. In the heatmap, white lines individuate clusters belonging to the same cluster at the 2nd level of the hierarchy, while red lines divide different clusters at the 1st level. The representative keyword of the clusters at level 3 is reported in bold in the respective rows, while all the specific keywords identified at the 4th hierarchical level are shown within brackets. Clusters with less than 500 papers in total are not shown in the figure