Understanding Instrumental Variables in Models with Essential Heterogeneity
| Year of publication: |
2006
|
|---|---|
| Authors: | Heckman, James J. ; Urzua, Sergio ; Vytlacil, Edward |
| Published in: |
The review of economics and statistics. - Cambridge, Mass : MIT Press, ISSN 0034-6535, ZDB-ID 2079628. - Vol. 88.2006, 3, p. 389-432
|