A recent paper suggested that smoking does not increase medical care expenditures and, therefore, that reduced smoking is unlikely to decrease it. This conclusion differs from that of most other studies in this area and the reasons for this disagreement are investigated. It is pointed out that...

Recently there has been a growing interest in the problems of inference for stochastic processes when the underlying distribution is not specified in terms of a parametric family. Godambe's (1985) approach is here employed to obtain estimates for random signals for a continuous semimartingale...

In this article, we focus on the circumstances in quasi-likelihood inference that the estimation accuracy of mean structure parameters is guaranteed by correct specification of the first moment, but the estimation efficiency could be diminished due to misspecification of the second moment. We...