Fig. 1
a Maps the total number of academic publications in 2018 (log). b, c The temporal evolution of the total number of publications, and internationally coauthored publications, across geographical regions between 1970 and 2018 (Total collaboration counts may be found in supplementary file 'Total collaboration count by country, year' (Additioanl file 2), while aggregated publication counts for subfigure 1d are in supplementary file 'Total publications aggregated to five year periods (Additional file 4)). Finally, d displays the rank of countries in terms of the number of academic publications in 1970, 1985, 2000, and 2015. We observe some emerging economies such as China, Korea, Iran, and Malaysia rising significantly in rank towards the end of the time period