Estimation of a two-stage LES-AIDS consumer demand system for eight EC countries
估计了八个欧共体国家的两阶段消费者需求系统，上层用AIDS系统分配非承诺支出，下层用LES系统分配食品支出，并确保支出函数的凹性和价格指数的一致性。
This paper discusses specification and an estimation of a two-stage LES-AIDS consumer demand system for eight EC countries. The upper level allocates uncommitted expenditure via an AIDS system between food, beverages and other commodities. The technique used exploits the fact that there are only three AIDS-aggregates to explicitly maintain concavity of the expenditure function within a given range of budget shares; it also ensures consistency of the aggregate price index in the AIDS with the parameters of the system. The lower level allocates food via an LES-system for ten categories, with time-dependent commitments. Empirical results look promising.