@techreport{NBERw12230,
 title = "On the Optimal Timing of Benefits with Heterogeneous Workers and Human Capital Depreciation",
 author = "Robert Shimer and Iván Werning",
 institution = "National Bureau of Economic Research",
 type = "Working Paper",
 series = "Working Paper Series",
 number = "12230",
 year = "2006",
 month = "May",
 URL = "http://www.nber.org/papers/w12230",
}