1. Introduction -- 2. The structure of interaction -- 3. Fish markets : an example of the emergence of aggregate coordination -- 4. Financial markets: bubbles, herds and crashes -- 5. Public goods : a coordination problem -- 6. Segregation : Schelling's model -- 7. Conclusion.

We show that a class of microeconomic behavioral models with interacting agents, derived from Kirman (1991) and Kirman (1993), can replicate the empirical long-memory properties of the two first-conditional moments of financial time series. The essence of these models is that the forecasts and...