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Briefing
A More Comprehensive Measure of the Black-White Wealth Gap
In this article, we apply a simple graphical device — the plot of the relative rank distribution — to summarize the Black-White wealth gap. We also introduce the relative rank Gini coefficient — an analog to the standard Gini coefficient — as a summary measure of rank inequality. We find that the rank wealth gap is widest in the middle of the wealth distribution. Black-White rank wealth gaps are higher among college graduates than among other education groups. Households with young or retired heads have higher rank gaps than middle-aged households. We caution that rank gaps are not ...
Working Paper
Comparing Cross-Country Estimates of Lorenz Curves Using a Dirichlet Distribution Across Estimators and Datasets
Chotikapanich and Griffiths (2002) introduced the Dirichlet distribution to the estimation of Lorenz curves. This distribution naturally accommodates the proportional nature of income share data and the dependence structure between the shares. Chotikapanich and Griffiths (2002) fit a family of five Lorenz curves to one year of Swedish and Brazilian income share data using unconstrained maximum likelihood and unconstrained non-linear least squares. We attempt to replicate the authors' results and extend their analyses using both constrained estimation techniques and five additional years of ...