TY  - BOOK
AU  - Heckman,James J.
AU  - Urzua,Sergio
ED  - National Bureau of Economic Research.
TI  - Comparing IV With Structural Models: What Simple IV Can and Cannot Identify 
T2  - NBER working paper series
PY  - 2009///
CY  - Cambridge, Mass.
PB  - National Bureau of Economic Research
N1  - February 2009; Hardcopy version available to institutional subscribers
N2  - This paper compares the economic questions addressed by instrumental variables estimators with those addressed by structural approaches. We discuss Marschak's Maxim: estimators should be selected on the basis of their ability to answer well-posed economic problems with minimal assumptions. A key identifying assumption that allows structural methods to be more informative than IV can be tested with data and does not have to be imposed
UR  - https://www.nber.org/papers/w14706
UR  - http://dx.doi.org/10.3386/w14706
ER  -