Heterogeneity and Stability: Variations on Scarf's Processes.

There are still problems in handling diversity in economics. The general equilibrium model itself lacks determinacy for a generic population of economic agents. In an ourstanding contribution, Jean-Michel Grandmont (1992) argues that increasing behavioural heterogeneity makes aggregate expenditures more independent of prices.Thisnote emphasises the specific nature of the distributions in Grandmont's framework and enhances that the strong macroeconomic regularities that he evidences cannot be considered as a general property of exchange markets.