This paper empirically applies the statistical approaches to the phenomenon of polarization generated by Esteban, et al. (1999) and Gradín (2000) in order to quantify the evolution of the middle class in Mexico and the role of various household attributes in the formation of groups during...

We show that the h-index and the g-index, which are commonly used to mea- sure the research productivity of a scientist, may be seen as concentration indices. For these indices we also propose transformations that make them always ranging between two known limits, which correspond to the...

This paper analyzes the relationship between mean income and the income of the rich. Our methodology closely follows that of Dollar and Kraay (2002), but instead of looking at the bottom of the distribution, we analyze the top. We use panel data from the World Top Incomes database, which...