Testing for the Unconfoundedness Assumption Using an Instrumental Assumption

@inproceedings{Luna2016TestingFT,
  title={Testing for the Unconfoundedness Assumption Using an Instrumental Assumption},
  author={Xavier de Luna},
  year={2016}
}
The identification of average causal effects of a treatment in observational studies is typically based either on the unconfoundedness assumption (exogeneity of the treatment) or on the availability of an instrument. When available, instruments may also be used to test for the unconfoundedness assumption. In this paper, we present a set of assumptions on an instrumental variable which allows us to test for the unconfoundedness assumption, although they do not necessarily yield nonparametric… CONTINUE READING