@techreport{ h0038,
 title = "Early Indicators of Later Work Levels, Disease, and Death",
 author = "Robert W. Fogel and Larry T. Wimmer",
 institution = "National Bureau of Economic Research",
 type = "Working Paper",
 series = "Historical Working Paper Series",
 number = "38",
 year = "1992",
 month = "May",
 URL = "http://www.nber.org/papers/h0038",
}