Wentzel, Arnold (2007). "How Economists Generate Breakthrough Ideas:Amartya Sen And The Capability Approach" Paper presented at the 4th annual conference of the HDCA, 18-20 September 2007, New York, USA.

This paper takes the view that scientific progress is driven by unsolved problems. The work of Amartya Sen, with emphasis on the liberal paradox and the capability approach provides a running illustration, and shows that an understanding of the structure of economic problems can allow more theorists to deliver innovative theoretical work.