@techreport{ w9771,
 title = "Secular Trends in Physiological Capital: Implications for Equity in Health Care",
 author = "Robert W. Fogel",
 institution = "National Bureau of Economic Research",
 type = "Working Paper",
 series = "Working Paper Series",
 number = "9771",
 year = "2003",
 month = "June",
 URL = "http://www.nber.org/papers/w9771",
}