This paper provides some empirical evidence and a theory of the relationship between residual wage inequality and the increasing dispersion of capital/labor ratios across firms. I document the increasing variance of capital/labor ratios across firms in the US labor market. I also show that the increase in the capital intensity variance across firms is associated with the increasing wage variance across workers. To explain this empirical fact, I adopt a search model where firms differ in their optimal capital investment. The decline in the relative price of equipment capital makes the firm distribution of capital/labor ratios more dispersed. In a frictional labor market, this force generates wage dispersion among identical workers. Simple calibration of the model indicates that the dispersion of capital/labor ratios can account for about one third of the total increase in residual wage inequality.
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Paper provided by Institute for the Study of Labor (IZA) in its series IZA Discussion Papers with number
909.
Find related papers by JEL classification: J21 - Labor and Demographic Economics - - Demand and Supply of Labor - - - Labor Force and Employment, Size, and Structure J31 - Labor and Demographic Economics - - Wages, Compensation, and Labor Costs - - - Wage Level and Structure; Wage Differentials
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