We decompose the Lorenz curve (LC) and its associated concentration curve (CC) by population subgroups. To illustrate these decompositions, we examine changes in earnings inequality among West Germans, East Germans, and foreign guest workers during the recent German unification. We show that...

We use the Interdistributional Lorenz Curves (ILCs) of Butler and McDonald (1987) to visualize convergence or divergence between income distributions. To illustrate the idea, we compare income distributions from Spain, Italy, and Germany. We also offer methods to test for significant differences...

Micro data from audited tax returns are used to evaluatechanges in the actual progressitivity of U.S. federal incometaxes in 1979 and 1988, which is distinct from apparent progressivity.Statistical inference methods are applied to global measuresof both actual and apparent residual and liability...

The reductions in the top marginal rates during the 1980's have renewed interest in the relationship between the underreporting of income and the marginal tax rates. Unfortunately, theory provides no clear answer to question of whether lower marginal tax rates reduce or increase the size of the...