My decision to leave applied mathematics for economics was in part tied to the widely-held popular belief in the 1960s that macroeconomics had made fundamental inroads into controlling business cycles and stopping dysfunctional unemployment and inflation.
As an undergraduate at Columbia, I went to the engineering school. I had a great deal of training in engineering and mathematics as well as subdiversified training. And then I went to the California Institute of Technology to do my Ph.D. in applied math.