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La Séparabilite latente: groupement des biens sans la séparabilite faible : cas de la Tunisie

Cherif, Olfa (Institut Supérieur de Gestion de Tunis) ; Ayadi, Mohamed. (Institut Supérieur de Gestion de Tunis)

Abstract: This paper has dealt with the new concept of " latent separability" in which there can be overlapping groups that can enter desaggregated demand systems. latent separability provides a useful theoretical and empirical framework for investigating the grouping of goods and of relative, prices in demand analysis. each group of goods requires at least on exclusive good, however, traditional separability concepts require mutually exclusive groups. latent separability is a generalization of weak separability, it provides restrictions on the substitution matrix. for the translog and almost ideal models of consumer behavior and their generalization the number of latently separable groups has been shown to relate directly to the rank of an estimated price and income coefficient matrix. the identification of the composition of each group is achieved from the prior choice of at least one exclusive good per group. homoyhetic latent separability has been shown to allow more flexibility in income reponses than the corresponding homothetic weak separability. consequently gains in the precision of estimated price elasticities can be archieved without imposing the strong restrictions on estimated income elasticities implied by homothetic weak separability. in an empirical application to the 21 goods of food usin in INS survey a grouping into 10 latent separable groups was found to be acceptable. there resulting estimated showed a considerable improvement in the precision of the price elasticities and a strong rejection of weak separability.




Note: Mast. (Marketing)—Institut Supérieur de Gestion de Tunis, Tunis, 2004
Note de localisation: CNUDST (TUN01)
Code de rangement: U23356

The record appears in these collections:
Thesis & Reports > Master

 Record created 2021-02-22, last modified 2021-02-22


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