A review of the measures of the stock of human capital used in empirical growth research reveals that human capital is mostly poorly proxied. The simple use of the most common proxy, average years of schooling of the working-age population, misspecifies the relationship between education and the...

Recent work by Woolley, Chabris, Pentland, Hashmi, & Malone and their colleagues finds evidence for a general collective intelligence factor that predicts a group’s performance on a wide variety of tasks, like the general intelligence factor does for individuals. Credé and Howardson argue...