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Firm Heterogeneity in Capital/Labor Ratios and Wage Inequality

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  • Leonardi, Marco

    (University of Milan)

Abstract

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.

Suggested Citation

  • Leonardi, Marco, 2003. "Firm Heterogeneity in Capital/Labor Ratios and Wage Inequality," IZA Discussion Papers 909, Institute of Labor Economics (IZA).
    • Handle: RePEc:iza:izadps:dp909
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    More about this item

    Keywords

    capital intensity; wage inequality; search models;
    All these keywords.

    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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