Heckman, J., Tobias, J. L., & Vytlacil, E. (2000). Simple estimators for treatment parameters in a latent variable framework with an application to estiamting the returns to schooling. National Bureau of Economic Research.
Lua i Stíl Chicago (17ú heag.)Heckman, James, Justin L. Tobias, agus Edward Vytlacil. Simple Estimators for Treatment Parameters in a Latent Variable Framework with an Application to Estiamting the Returns to Schooling. Cambridge: National Bureau of Economic Research, 2000.
Lua MLA (9ú heag.)Heckman, James, et al. Simple Estimators for Treatment Parameters in a Latent Variable Framework with an Application to Estiamting the Returns to Schooling. National Bureau of Economic Research, 2000.
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