Estimating engel curves: a generalisation of the P-Tobit model

Stephen Pudney

Finnish Economic Papers, 1988, vol. 1, issue 2, 129-147

Abstract: Cross-section demand relationships are usually estimated using data from short-duration expenditure surveys. The interpretation of such observations is not straightforward, since a zero recorded expenditure may understate true demand and a positive expenditure overstates demand. Deaton and Irish have recently proposed and applied the P- Tobit technique to deal with this problem, but with little success. The present paper specifies a generalisation of their model and applies alternative estimators to two different sets of UK survey data.

Date: 1988
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