TY  - JOUR
AU  - Florens,Jean-Pierre
AU  - Heckman,James J.
AU  - Meghir,Costas
AU  - Vytlacil,Edward J.
TI  - Identification of Treatment Effects Using Control Functions in Models with Continuous, Endogenous Treatment and Heterogeneous Effects
JF  - National Bureau of Economic Research Working Paper Series
VL  - No. 14002
PY  - 2008
Y2  - May 2008
UR  - http://www.nber.org/papers/w14002
L1  - http://www.nber.org/papers/w14002.pdf
N1  - Author contact info:
Jean-Pierre Florens
Manufacture des Tabacs
Bâtiment F – 4ème étage
21, allée de Brienne
31000 Toulouse – France
E-Mail: florens@cict.fr

James J. Heckman
Department of Economics
The University of Chicago
1126 E. 59th Street
Chicago, IL 60637
Tel: 773/702-0634
Fax: 773/702-8490
E-Mail: jjh@uchicago.edu

Costas Meghir
Department of Economics
University College London
Gower Street
London WC1E 6BT ENGLAND
E-Mail: c.meghir@ucl.ac.uk

Edward J. Vytlacil
Department of Economics
Yale University
Box 208281
New Haven, CT 06520-8281
Tel: 203/432-3244
Fax: 203/432-6167
E-Mail: edward.vytlacil@yale.edu
AB  - We use the control function approach to identify the average treatment effect and the effect of treatment on the treated in models with a continuous endogenous regressor whose impact is heterogeneous. We assume a stochastic polynomial restriction on the form of the heterogeneity but, unlike alternative nonparametric control function approaches, our approach does not require large support assumptions.
ER  -