We propose a methodology to analyze the dynamic features of total factor productivity (TFP). Factor efficiency is assumed to evolve according to an unobserved component model which has the form of a dynamic version of factor analysis and which nests most of the specifications for technology...

In this paper, we formulate a structural time series model for aggregate quarterly nondurable consumption by using the life cycle consumption hypothesis under uncertainty to obtain a model for the trend cycle component. The seasonal components are assumed to sum to a white noise. The model is...

We consider consistent estimation of regression models in which the exogenous variables are incompletely observed assuming that the response mechanism is random. In the literature on imputed data, several estimators have been proposed which are based on approximations substituted for the missing...