Scandinavian Working Papers in Economics

Working Papers in Economics,
University of Gothenburg, Department of Economics

No 35: Should We Use Distributional Weights in CBA When Income Taxes Can Deal with Equity?

Olof Johansson-Stenman
Additional contact information
Olof Johansson-Stenman: Department of Economics, School of Economics and Commercial Law, Göteborg University, Postal: Box 640, SE 405 30 GÖTEBORG

Abstract: Kaplow (1996) and others argue forcefully in favor of using the standard cost-benefit test alone, without any distributional concern, given “standard simplifying assumptions.” This paper, on the contrary, demonstrates that distributional weights, equal to the social marginal utility of income, should be applied in cost-benefit analysis, given weak separability in public goods instead of in leisure. This result holds for linear as well as non-linear income taxes, and whether they are optimal or not. A correspondingly modified Samuelson rule is derived and more general policy recommendations discussed.

Keywords: public goods; distributional weights; equity and efficiency; separability; cost-benefit; optimal taxation

JEL-codes: D61; H21; H41

22 pages, February 28, 2001

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