Do veterans earn less? During WW I, the US organized "the greatest human lottery in history": a random draft of 24 million men. Ultimately, 2.8 million Americans were selected to join the armed forces. We sample 10% of registrants of the 1917 lottery and match these men with the 1930 and 1940 US...

This article examines the effects of market structure on the variety of research projects undertaken and the amount of duplication of research. A characterization of the equilibrium market portfolio of R&D projects and the socially optimal portfolio is provided. It is shown that a merger...