Global inequality between world citizens, using the new PPP data (just published as part of the 2005 ICP), is estimated to be about 70 Gini points. This is some 4-5 Gini points higher than previously thought. The increases are even greater if one uses the Theil index

The median voter hypothesis plays an important role in endogenous growth theories. It provides the political mechanism through which voters in more unequal countries redistribute a larger proportion of income and thus, it is argued, by blunting incentives reduce country's growth rate. However,...