We perform maximum-likelihood estimation of a model of international asset pricing based on CAPM. We test the restrictions imposed by CAPM against a more general asset pricing model. The "betas" in our CAPM vary over time as the supplies of assets change and as the conditional covariances or...

We define a hierarchy of parametric and semiparametric specifications for censored regression models that is ordered according to the strength of the assumptions that are made. We review the estimation techniques and specification tests that are available at each level of the hierarchy. The...

This paper investigates firms' employment and output decisions and presents some empirical evidence concerning the rationality of firms' expectations. The dynamic model is based on the assumptions of convex adjustment costs and monopolistic competition in the product market. The results are...

This package performs specialized tasks related to specification, estimation, prediction and diagnostic checking in the context of a particular class of unobserved-components models. It is menu-driven and easy to use. Although the present (first) release suffers from a number of limitations,...