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I investigate the determinants of the hazard rates of both starting and quitting the cigarette smoking habit. The model is an ordered probit split-sample duration model with lagged duration dependence and time-varying covariates (cigarette price and regulation). Duration of the smoking habit is approximately unitary elastic with respect to cigarette price. 7he hazard rate of starting smoking peaks sharply and quickly declines before age 20. Both nonparametric and parametric results indicate that the quitting hazard rate rises with the habit b duration, a result at odds with survey data but consistent with the economic model of rational addiction. (JEL C41,*112)

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Depression significantly impacts adherence to OHAs in patients with type 2 diabetes. The study results imply that depression screening and treatment need to be included in the protocol for management of patients with type 2 diabetes.

We measure the effect of resource-sector dependence on long-run income growth using the natural experiment of coal mining in 409 Appalachian counties selected for homogeneity. Using a panel data set , we find a one standard deviation increase in resource dependence is associated with 0.5-1 percentage point long-run and a 0.2 percentage point short-run decline in the annual growth rate of per capita personal income. We also measure the extent to which the resource curse operates through disincentives to education, and find significant effects, but this "education channel" explains less than 15 percent of the apparent curse.*The authors thank Seth Wiggins for providing essential GIS expertise in obtaining and analyzing coal quality and surface-mining data.