PROGRESA (Programa de Educacion, Salud y Alimentacion) is an innovative Mexican program that provides cash transfers to poor rural households, on condition that their children attend school and their family visits local health centers regularly. Confronted with rising poverty after the economic...

Mobility implies initial and final distributions and a transition process linking the observations of these two distributions. An inequality index describes properties of the intitial or final distribution. A mobility index describes the transition. In most cases, mobility indices have been...