This paper was presented at the 2013 Cowles Foundation for Research in Economics conference in Econometrics: Partial Identification, Weak Identification, and Related Econometric Problems. The conference took place on 5 June 2013 at YALE SOM, Watson Center.
This paper was presented at Mathematisches Forschungsinstitut Oberwolfach conference on "Mathematical Statistics of Partially Identified Objects" on 22 April 2013.
Presentation given at the first Centre of Excellence in Population Ageing Research (CEPAR) annual conference, 2 July, 2013, University of New South Wales, Sydney