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This paper presents an intertemporal general equilibrium model with rationing in the product market, in which stationary sunspot equilibria are shown to exist, indicating the possibility of fluctuations in economic activity simply due to self-fulfilling variations in economic agents' expectations. Specifically, revised expectations about future aggregate demand change current investment demand, which (amplified by a 'multiplier' process) then affects current aggregate demand. Parameter values required for endogenous fluctuations are discussed, as well as quantitative properties of the fluctuations predicted. Countercyclical stabilization policies are shown to rule out such equilibria

Self-Fulfilling Expectations and Fluctuations in Aggregate Demand