Lessmann, Ortrud (2007). "Effective Freedom and Combined Capabilities:Two Different Conceptions of Capability" Paper presented at the 4th annual conference of the HDCA, 18-20 September 2007, New York, USA.

In many areas Amartya Sen and Martha Nussbaum, the two main advocates of the Capability Approach (CA), argue along the same lines and eve use similar phrasing. This paper argues that Sen’s and Nussbaum’s conceptions of capability differ fundamentally. This is done with regard to several components of the conception of capability.