April 2013 - Working Paper 704
December 2012 - Staff Report 476
July 2010 - Staff Report 450
November 2009 - Staff Report 438
August 2009 - Staff Report 434
Published In: Econometrica
(Vol. 77, No. 6, November 2009, pp. 1711-1750)
May 2009 - Staff Report 427