This paper identifies an internal inconsistency in the Heckscher-Ohlin (H-O) models of international exchange. The inconsistency stems from assuming homogeneity of inputs within a population. This assumption annihilates individual comparative advantage, benefits from exchange and, consequently,...

Sources of heterogeneity within the process of R&D investment, such as international differences in the maximum per-period rate of investment and level of regulatory uncertainty, offer a plausible explanation for US comparative advantage in biotechnology. Using dynamic stochastic simulation, the...