Does Taxation Affect Intrahousehold Distribution? A Simulation Approach

The literature on household behavior contains hardly any empirical research on the within-household distributional effects of tax-benefit policies. We simulate this effect in the framework of a collective model of labor supply when shifting from a joint to an individual taxation system in France. We show that the net-of-tax relative earning potential of the wife is a significant determinant of intrahousehold negotiation but with very low elasticity. Consequently, the labor supply responses to the reform are essentially driven by the traditional substitution and income effects as in a unitary model. For some households only, the reform alters the intrahousehold distribution in a way that tends to change normative conclusions. A sensitivity analysis shows that the distributional effects captured by the collective model would be significant only for reforms both radical and of extended scope.