In this paper we provide suffic ient condi tions, which, when combined with recent developments in the theory of exact aggregation, permit estimation of group specific demand systems when micro-level information is unavailable. We illustrate the approach by estimating group specific cost of...

Experience curves have for some time provided a conceptual framework for forecasting unit costs of new products or production activities. On a practical level, however, statistical estimation of experience curves involves a number of subtle model specification issues which if ignored can render...