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.
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Paper provided by National Bureau of Economic Research, Inc in its series NBER Working Papers with number
14002.
Length: Date of creation: May 2008 Date of revision: Handle: RePEc:nbr:nberwo:14002
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