The turn to the use of mixed qualitative and quantitative (Q-Squared) methods in the analysis of poverty is a welcome development with large potential payoffs. While the benefits of mixing are not in doubt, the tensions involved in so doing have not received adequate attention. The aim of this...

Simulation of nonparametric efficiency shows that even when the number of firms is large, defining ten or more inputs results in most firms being efficient. Comparison of empirical with simulated results suggests that the dimension of the problem rather than actual efficiencies has the greater...