David N. Weil is the James and Merryl Tisch Professor of Economics at Brown University and a Research Associate of both the National Bureau of Economic Research and Brown’s Population Studies Training Center. He received his B.A. in History from Brown in 1982 and his Ph.D. in Economics from Harvard in 1990. He has written widely on various aspects of economic growth including cross-country empirics, accumulation of human and physical capital, appropriate technology, fertility, habit formation, and health, as well as on such non-growth topics as demographic economics, Social Security, monetary policy, portfolio allocation, and inequality.  He is the author of an undergraduate textbook on economic growth and co-editor of the four volume African Successes (University of Chicago Press, 2016).