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Elasticities in AIDS models

In the literature, a variety of approaches have been used to calculate demand elasticities in almost ideal demand system (AIDS) models of demand. It is common to estimate the linear approximate almost ideal demand system (LA/AIDS) instead of the AIDS. When the LA/AIDS is estimated, all of the previo...

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Bibliographic Details
Published in:American journal of agricultural economics 1990-05, Vol.72 (2), p.442-445
Main Authors: Green, R. (University of California, Davis), Alston, J.M
Format: Article
Language:English
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Summary:In the literature, a variety of approaches have been used to calculate demand elasticities in almost ideal demand system (AIDS) models of demand. It is common to estimate the linear approximate almost ideal demand system (LA/AIDS) instead of the AIDS. When the LA/AIDS is estimated, all of the previously reported approaches to compute elasticities are theoretically incorrect. This paper presents correct formulas for LA/AIDS elasticities and illustrates the potential errors from using incorrect computing formulas.
ISSN:0002-9092
1467-8276
DOI:10.2307/1242346