We examine whether the latent behavioral mechanisms embedded in two "price effects" explanations of the obesity problem are operative. Our findings lend support to the hypothesis that falling food price is one likely cause of the obesity epidemic.

This paper develops semiparametric Bayesian estimation approach for Poisson regression models with unobserved heterogeneity of unknown density. This approach is computationally efficient and allows automatic adaptation of the approximating density to data during estimation. Simulations show the...