We explore the stability properties of interest rate rules granting an explicit response to stock prices in a New Keynesian DSGE model where the presence of non-Ricardian households makes stock prices nonredundant for the business cycle. We find that responding to stock prices enlarges the policy space for which the equilibrium is both determinate and E-stable (learnable). In particular, the Taylor principle ceases to be necessary, and determinacy/E-stability is granted also by mildly passive policy rules. Our results appear to be more prominent in economies featuring a lower elasticity of substitution across differentiated products and/or more rigid labor markets

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We analyze coordination of monetary and exchange rate policy in a two-sector model of a small open economy featuring imperfect substitution between domestic and foreign financial assets. Our central finding is that management of the exchange rate greatly enhances the efficacy of inflation targeting. In a flexible exchange rate system, inflation targeting incurs a high risk of indeterminacy where macroeconomic fluctuations can be driven by self-fulfilling expectations. Moreover, small inflation shocks may escalate into much larger increases in inflation ex post. Both problems disappear when the central bank leans heavily against the wind in a managed float.

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We introduce Max Weber's spirit of capitalism hypothesis into a benchmark Lucas' tree asset pricing model by assuming that economic agents derive direct utility from wealth. We prove the existence of perfect foresight equilibria where the pricedividend ratio displays explosive rational bubble solutions, endogenous periodic cycles and chaotic dynamics.