caa a22 4500 378936360 CHVBK 20180305123641.0 cr unu---uuuuu 161128e20040709xx s 000 0 eng 10.2202/1538-0645.1273 doi (NATIONALLICENCE)gruyter-10.2202/1538-0645.1273 Manning Alan 1 a.manning@lse.ac.uk Instrumental Variables for Binary Treatments with Heterogenous Treatment Effects: A Simple Exposition [Elektronische Daten] [Alan Manning] This note provides a simple exposition of what IV can and cannot estimate in a model with binary treatment variable and heterogenous treatment effects. It shows how linear IV is essentially a misspecification of functional form and the reason why linear IV estimates will generally depend on the instrument used is because of this misspecification. It shows that if one can estimate the correct functional form then the treatment effects are independent of the instruments used. However, the data may not be rich enough in practice to be able to identify these treatments effects without strong distributional assumptions. In this case, one will have to settle for estimations of treatment effects that are instrument-dependent. ©2011 Walter de Gruyter GmbH & Co. KG, Berlin/Boston Instrumental variables nationallicence treatment effects nationallicence identification nationallicence Contributions in Economic Analysis & Policy De Gruyter 3/1(2004-07-09) 3:1 2004 3 bejeap https://doi.org/10.2202/1538-0645.1273 text/html Onlinezugriff via DOI 1 research article jats NATIONALLICENCE 856 40 https://doi.org/10.2202/1538-0645.1273 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Manning Alan 1 a.manning@lse.ac.uk NATIONALLICENCE 773 0- Contributions in Economic Analysis & Policy De Gruyter 3/1(2004-07-09) 3:1 2004 3 bejeap CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-gruyter