Consumer demand microdata typically exhibit a great deal of expenditure variation but not very much price variation. In this paper, we propose a semiparametric approach to the consumer demand problem in which expenditure share equations are nonparametric in the real expenditure direction and...

We propose an Exact Affine Stone Index (EASI) demand system, which delivers the convenient properties of Hicksian demands in an empirically simple framework. Like the Almost Ideal Demand (AID) system, EASI budget shares are linear in parameters given real expenditures. However, unlike AID, EASI...