Fa. Cowell et Sp. Jenkins, HOW MUCH INEQUALITY CAN WE EXPLAIN - A METHODOLOGY AND AN APPLICATIONTO THE UNITED-STATES, Economic journal, 105(429), 1995, pp. 421-430
We develop two simple measures of how much inequality is explained by
individual population characteristics or groups of characteristics, an
alogous to R2 in regression analysis. We investigate the measures' emp
irical implementation using several alternative theoretically consiste
nt approaches to inequality decomposition. Results are illustrated usi
ng US PSID income data.