This research addresses important empirical questions regarding the relationship between natural gas exports and Egyptian economic growth by extending the Dirtsakis's model (Dritsakis, 2004, p. 1834) with the addition of the labor force into the model and further by addressing the issue in a...

We consider nonparametric identification and estimation in a nonseparable model where a continuous regressor of interest is a known, deterministic, but kinked function of an observed assignment variable. This design arises in many institutional settings where a policy variable (such as weekly...

In this paper we perform inference on the effect of a treatment on survival times in studies where the treatment assignment is not randomized and the assignment time is not known in advance. Two such studies are discussed: a heart transplant program and a study of Swedish unemployed eligible for...