http://www.imf.org/external/pubs/ft/wp/2002/wp0212.pdf

...It is structure as follows: First it provides an overview of trends in Mexico’s income distribution and their broad determinants throughout the 1990s. Second, it analyzes the impact of various pro-poor and other social expenditure programs on Mexico’s income distribution. Concludes by offering some tentative thoughts on the links between pro-poor policies and distributional outcomes, suggesting policy options for improving these outcomes...(Au) (IMF Working Paper WP/02/12)