We report a puzzling pair of facts concerning the organization of science. The concentration of research output is declining at the department level but increasing at the individual level. For example, in evolutionary biology, over the period 1980 to 2000, the fraction of citation-weighted...

We report a puzzling pair of facts concerning the organization of science. The concentration of research output is declining at the department level but increasing at the individual level. For example, in evolutionary biology, over the period 1980 to 2000, the fraction of citation-weighted...

Little is currently known about the effects of skill composition on academic entrepreneurship. Therefore, in this paper, following Lazear’s (2005) jack-of-all-trades approach, we study how the composition of a scientist’s skills affects his or her intention to become an entrepreneur....