Please use this identifier to cite or link to this item: http://hdl.handle.net/10419/82176
Authors: 
Heckman, James
Navarro-Lozano, Salvador
Year of Publication: 
2003
Series/Report no.: 
Working Paper, IFAU - Institute for Labour Market Policy Evaluation 2003:4
Abstract: 
This paper investigates four topics. (1) It examines the different roles played by the propensity score (probabilitiy of selection) in matching, instrumental variable and control functions methods. (2) It contrasts the roles of exclusion restrictions in matching and selection models. (3) It characterizes the sensivity of matching to the choice of conditioning variables and demonstrates the greater robustness of control function methods to misspecification of the conditioning variables. (4) It demonstrates the problem of choosing the conditioning variables in matching and the failure of conventional model selection criteria when candidate conditioning variables are not exogenous.
Subjects: 
Propensity score
matching
selection models
JEL: 
C31
Document Type: 
Working Paper

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