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The Stabilizing Virtues of Fiscal vs. Monetary Policy on Endogenous Bubble Fluctuations

We explore the existence of endogenous fluctuations with a rational bubble and the stabilizing role of fiscal and monetary policies. Consumers' credit constraints, the role of collateral and a portfolio choice are the key ingredients of our analysis. We consider an overlapping generations model where households realize a portfolio choice between three assets with different returns (capital, money and bonds). Expectation-driven fluctuations and the multiplicity of steady states occur under a positive bubble on bonds, gross substitutability and large input substitution because of credit market imperfections. Focusing on the stabilizing role of policies, we show that a progressive taxation on capital income may rule out expectation-driven fluctuations and the multiplicity of steady states. In contrast, a monetary policy under a Taylor rule has a mitigated stabilizing role, depending on the reactiveness of the policy rule and the concavity of the utility function. When the monetary authority decides instead to fix the nominal interest rate regardless the inflation, decreasing the level of the nominal interest rate can rule out expectation-driven fluctuations, restore the uniqueness of steady states, but can damage the welfare at the steady state.

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Paper provided by Aix-Marseille School of Economics, Marseille, France in its series AMSE Working Papers with number 1343.

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Length: 42 pages
Date of creation: 17 Aug 2013
Date of revision: 17 Aug 2013
Handle: RePEc:aim:wpaimx:1343
Contact details of provider: Web page: http://www.amse-aixmarseille.fr/en

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