1. ?(s t , s t+1 ) leading to ? 2 = 1/r ? (? F ?F ) is found, the search process stops. In fact, it is sufficient to find ?(s t , s t+1 ) such that ? 2 < 1 in order to confirm indeterminacy. To summarize, if 1/r ? (? F ?F ) ? ? 2 < 1, then there is a continuum of mean-square stable sunspot components and;/r ? (? F ?F ) is the lower bound of ? 2 from Lemma
2. Monetary Policy Regimes and Beliefs;David Andolfatto;International Economic Review,2003
3. Macroeconomic Regimes
4. Monetary policy switching and indeterminacy