Solo authorship represented 80 % of economics papers in 1960 and 65 % in 1990, however then solo-authorship fell out of the bulk in 2005 and represents solely 26 % of economics papers at present (as measured by the right-hand axis). To place it one other method, in 1950, there have been 1.2 authors per economics paper. Common group measurement reached 2.0 for the primary time in 2010. By 2018, group measurement averaged 2.7 (as proven on the left-hand axis). The soar in common group measurement in economics papers over the past ten years is bigger than the soar over the prior half-century.
Right here is more from Benjamin F. Jones. For larger influence papers, the development is much more hanging.