A number of papers have discussed the relationship between the Almost Ideal Demand System (AIDS) and its linear approximation (LA/AIDS). In this paper, it is shown that if the prices in the system are normalized to one, the AIDS and LA/AIDS representations are identical at the point of...

Relationships between prices of goods offer motives of interest in at least two areas: market integration and product aggregation. There is a close relationship between market integration and aggregation, which may increase the usefulness of market integration studies. In this article, these...

This paper addresses the relationship between the cointegration approach to market delineation and the more traditional approach of analyzing the demand structure among different products in terms of degree of substitutability. Cointegration tests for market delineation and estimation of a...