Gelber, Alexander M. and Mitchell, Joshua W. (2009): Taxes and Time Allocation: Evidence from Single Women and Men. Unpublished.
Krishna, Kala (2009): Background Paper on the IMF's Trade Restrictiveness Index. Unpublished.
Milanovic, Branko; Lindert, Peter and Williamson, Jeffrey (2007): Measuring Ancient Inequality. Unpublished.