Heckman J J, Vytlacil E J
Department of Economics, University of Chicago, Chicago, IL 60637, USA.
Proc Natl Acad Sci U S A. 1999 Apr 13;96(8):4730-4. doi: 10.1073/pnas.96.8.4730.
This paper examines the relationship between various treatment parameters within a latent variable model when the effects of treatment depend on the recipient's observed and unobserved characteristics. We show how this relationship can be used to identify the treatment parameters when they are identified and to bound the parameters when they are not identified.
本文研究了在潜在变量模型中，当治疗效果取决于接受者的观察到的和未观察到的特征时，各种治疗参数之间的关系。我们展示了这种关系如何在治疗参数可识别时用于识别它们，以及在参数不可识别时用于对其进行界定。
