John M. Clark and frank H. Knight on the adding-up theorem, overhead costs, and more

This note offers new archival insight into a 1925 polemical exchange between Frank Knight and John Maurice Clark that was hosted in the pages of Journal of Political Economy. Although the exchange centered on the effects of overhead costs on marginal productivity theory and the so-called adding-up theorem, it also provided significant elements to assess the methodological differences between two of the most representative American economists of the interwar years.