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The American High School Graduation Rate: Trends and Levels
Heckman, James J; LaFontaine, Paul A - In: The review of economics and statistics 92 (2010) 2, pp. 244-263
Persistent link: https://www.econbiz.de/10008404504
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Understanding instrumental variables in models with essential heterogeneity
Heckman, James J.; Urzua, Sergio; Vytlacil, Edward - In: The review of economics and statistics 88 (2006) 3, pp. 389-432
Persistent link: https://www.econbiz.de/10003384388
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Understanding Instrumental Variables in Models with Essential Heterogeneity
Heckman, James J.; Urzua, Sergio; Vytlacil, Edward - In: The review of economics and statistics 88 (2006) 3, pp. 389-432
Persistent link: https://www.econbiz.de/10007296385