The Almost Ideal Demand System: A Comparison and Application to Food Groups

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 demand system for analyzing food commodities Its linear approximate version IS a good first-order approximation to the complete system and IS easy to estimate