We propose an extension of the class of rational expectations bubbles (REBs) to the more general rational beliefs setting of Kurz (1994a,b). In a potentially non-stationary but stationarizable environment, among an heterogenous population of agents, it is possible to hold more than one...

1 Abstract -- 2 Introduction -- 3 Chapter I: Literature on the subject of excess volatility -- 4 Chapter II: Excess volatility beyond discount rates -- 5 Chapter III: Evidence of excess volatility in the Eurozone market -- 6 Conclusions.