We estimate the effect of education and student status on the propensity to smoke. Our estimation strategy accounts for the endogeneity of education by "differencing out" the impact of unobserved characteristics correlated with educational attainment. This is accomplished by exploiting education...

Generic drugs play an important role in disciplining drug prices and controlling rising drug costs. However, the effect that an additional generic drug competitor has on drug prices is difficult to measure because the number of firms competing in a market is endogenously determined. We identify...