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 right this moment (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 dimension reached 2.0 for the primary time in 2010. By 2018, group dimension averaged 2.7 (as proven on the left-hand axis). The bounce in common group dimension in economics papers over the past ten years is larger than the bounce over the prior half-century.
Right here is more from Benjamin F. Jones. For increased affect papers, the pattern is much more hanging.