Heckman, James J.; Urzua, Sergio; Vytlacil, Edward - Institute for the Study of Labor (IZA) - 2008
) with at least partial knowledge of the idiosyncratic response to the treatments. We define treatment effects in a general … best alternative without requiring knowledge of any structural parameters from the choice equation or any large support … or knowledge of the latent index function of the multinomial choice model. …