Heterogeneity is likely to be an important determinant of the shape of optimal tax schemes. This article addresses the issue in a model à la Mirrlees with a continuum of agents. The agents differ in their productivities and opportunity costs of work, but their labor supplies depend only on a...

Governments, over much of the developed world, make significant financial transfers to parents with dependent children. For example, in the US the recently introduced Child Tax Credit (CTC), which goes to almost all children, costs almost $1billion each week, or about 0.4% of GNP. The UK has...