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THE DEMAND FOR HEALTH INSURANCE AMONG UNINSURED AMERICANS: RESULTS OF A SURVEY EXPERIMENT AND IMPLICATIONS FOR POLICY
Krueger, Alan B, (2011)
Trends in Relative Black-White Earnings Revisited.
Card, David, (1993)
Estimates of the Economic Returns to Schooling from a New Sample of Twins.
Ashenfelter, Orley, (1994)