@techreport{NBERw14093,
 title = "The Cost of Uncertain Life Span",
 author = "Ryan D. Edwards",
 institution = "National Bureau of Economic Research",
 type = "Working Paper",
 series = "Working Paper Series",
 number = "14093",
 year = "2008",
 month = "June",
 URL = "http://www.nber.org/papers/w14093",
}