Income Tax, Wage Tax, and Optimal Tax

Abstract

Recent studies find wage subsidies (WS) to be superior to negative income tax (NIT). However, these studies suffer from a serious aggregation problem. A model is suggested in which these aggregation problems are avoided. In this model there exists a WS schedule that increases labor supply compared with an equally costly NIT. However, the WS may be Pareto inferior. Furthermore, for high income workers given any income tax system it is always possible to find a wage tax system which both is Pareto superior and increases labor supply. The merits of the model and its implications for other optimal income tax studies are critically discussed.