Inequality, Nonhomothetic Preferences, and Trade: A Gravity Approach
Muhammed Dalgin, Victor Trindade, Devashish Mitra
Southern Economic Journal, vol. 74, 2008, p. 747-774.

Inequality and Trade
Devashish Mitra, Victor Trindade
Canadian Journal Of Economics, vol. 38, 2005, p. 1253-1271.