Using Selection on Observed Variables to Assess Bias from Unobservables when Evaluating Swan-Ganz Catheterization

摘要

We estimate the effects of Swan-Ganz cath-eterization using the methods of Altonji, Elder, and Taber (2002, 2005). Our main conclusion is that while it is difficult to find evidence that C lowers mortality in the long run, Connors et al.'s data are not su