Before revision: The instrumental variable quantile regression (IVQR) model of Chernozhukov and Hansen (2005, 2006 ) is a flexible and powerful tool for evaluating the impact of endogenous covariateson the whole distribution of the outcome of interest.
After revision: The instrumental variable quantile regression (IVQR) model ( Chernozhukov and Hansen (2005, 2006 ) is a flexible and powerful tool for evaluating the impact of endogenous covariateson the whole distribution of the outcome of interest.