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The demand for a healthy diet: estimating the almost ideal demand system with infrequency of purchase

By Richard Tiffin and Matthieu Arnoult

Abstract

A Bayesian method of estimating multivariate sample selection models is introduced and applied to the estimation of a demand system for food in the UK to account for censoring arising from infrequency of purchase. We show how it is possible to impose identifying restrictions on the sample selection equations and that, unlike a maximum likelihood framework, the imposition of adding up at both latent and observed levels is straightforward. Our results emphasise the role played by low incomes and socio-economic circumstances in leading to poor diets and also indicate that the presence of children in a household has a negative impact on dietary quality

Publisher: Oxford University Press
Year: 2010
OAI identifier: oai:centaur.reading.ac.uk:16773

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