Industrial Specialization and the Returns to Labor
研究美国城市产业专业化对工资和失业的影响，发现专业化城市失业风险更高，但工人通过更高工资获得补偿，这间接证明了专业化的收益。
Comparative advantage and the division of labor make geographic concentration of production within a nation profitable and cause many cities to be specialized in one or a few main industries. Specialized cities, however, suffer greater unemployment risk. The theory of compensating wage differentials predicts that individuals living in more specialized cities will be compensated in the form of higher wage rates. The authors study the effects of specialization on wages and unemployment in the United States. They find evidence of compensating wage differentials. That firms choose to locate in more specialized, higher-wage cities is indirect evidence of the gains to specialization. Copyright 1990 by University of Chicago Press.