Transformations of the commodity space, behavioral heterogeneity, and the aggregation problem
研究交换经济中的加总问题，通过对家庭特征分布施加限制，给出市场需求价格弹性的近似边界，发现行为异质性增加会使总支出更独立于价格，从而影响弱公理、总替代性及瓦尔拉斯均衡的唯一性与稳定性。
Aggregation in exchange markets is studied by imposing restrictions on distributions of the households' characteristics. Approximate bounds for market demand price elasticities that depend upon specific measures of behavioral heterogeneity are provided. Increasing behavioral heterogeneity makes aggregate expenditures more independent of prices. This has strong consequences for the prevalence, in the aggregate, of the weak axiom of revealed preference, of gross substitutability, and on uniqueness and stability of the Walrasian exchange equilibrium. These strong macroeconomic regularities are obtained essentially through distributional assumptions, as no “rationality” requirements are imposed on individual demand functions, other than homogeneity and Walras' Law.