NATIONAL BUREAU OF ECONOMIC RESEARCH
NATIONAL BUREAU OF ECONOMIC RESEARCH

What is Labor Supply and Do Taxes Affect It?

Harvey S. Rosen

NBER Working Paper No. 411 (Also Reprint No. r0120)
Issued in November 1979
NBER Program(s):   PE

The issue of tax-induced changes in labor supply behavior has been receiving increasing attention. Economic theory alone can say little about the impact of income taxation on labor supply because of the well- known conflict between income and substitution effects. Therefore, an enormous amount of effort has been devoted to empirical investigation of this problem, with a focus on the impact of taxes on hours of work and labor force participation rates. In Section I of this paper, I briefly discuss this literature and its major conclusions. It has been long understood, however, that the concept "labor supply" is more general than "hours of work." If one individual is healthier, better educated, and more highly motivated than another, then presumably a given number of hours of work will lead to a greater effective labor supply for the former than for the latter. Thus, studies of the effect of taxes on other dimensions of labor supply are needed in order to assess the full impact of taxes on work incentives. The main purpose of this paper is to discuss some of this research (Section II) and to explore its policy implications (Section III).

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Document Object Identifier (DOI): 10.3386/w0411

Published: Rosen, Harvey S. "What is Labor Supply and Do Taxes Affect It?" The American Economic Review, Vol. 70, No. 2, (May 1980), pp. 171-176. citation courtesy of

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