We provide a computationally simple method of including and analyzing the effects of sunspot shocks in linear rational expectations models when the equilibrium is indeterminate. Under non uniqueness sunspots can affect model dynamics through endogenous forecast errors that do not completely...

This paper considers a prototypical monetary business cycle model for the U.S. economy, in which the equilibrium is undetermined if monetary policy is "inactive". In previous multivariate studies it has been common practice to restrict parameter estimates to values for which the equilibrium is...