Heckman, J. J., & Smith, J. A. (1997). The sensitivity of experimental impact estimates: Evidence from the national JTPA study. National Bureau of Economic Research.
Citazione stile Chigago Style (17a edizione)Heckman, James J., e Jeffrey A. Smith. The Sensitivity of Experimental Impact Estimates: Evidence from the National JTPA Study. Cambridge: National Bureau of Economic Research, 1997.
Citatione MLA (9a ed.)Heckman, James J., e Jeffrey A. Smith. The Sensitivity of Experimental Impact Estimates: Evidence from the National JTPA Study. National Bureau of Economic Research, 1997.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.