This article presents estimates of the almost Ideal demand system (AIDS) for four food groups_and compares these estimates WI~h the AIDS' own linear approximate version and the linear expenditure system The AIDS IS indirectly nonadditive and has several desirable properties, making it a Viable...

Quantifying the relationship between expenditure for a commodity and household income (Engel analysis) has focused on the use of classical functional forms with few rigorous procedures available for selecting the most appropriate function We employ flexible functional forms {Box-Cox curves} to...