Financial Crashes versus liquidity trap : the dilemma of monetary policy
AbstractThis paper considers a two-period monetary double auction with incomplete markets of securities and derivatives. Players may share heterogenous beliefs. Short positions in derivatives are constrained by collateral requirements. A central Bank stands ready to lend money or engage in unconventional monetary policy such as quantitative easing. In sharp contrast with the usual picture of equilibrium properties, I show that only three scenarios are compatible with Nash equilibrium condition : 1) either the economy enters a liquidity trap in the first period ; 2) or the money injected by the Central Bank fuels a financial inflation driven by "rational exuberance", whose burst leads to a global crash in the next period, 3) else a significant inflation of commodity prices accompanies the functioning of markets. In particular, neither Friedman's golden rule, nor the Taylor rule turn out to be compatible with the third scenario : Both inevitable lead to a liquidity trap. An example shows that quantitative easing does not provide, in general, any escape from the monetary dilemma.
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Bibliographic InfoPaper provided by Université Panthéon-Sorbonne (Paris 1), Centre d'Economie de la Sorbonne in its series Documents de travail du Centre d'Economie de la Sorbonne with number 10014.
Length: 40 pages
Date of creation: Feb 2010
Date of revision:
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Central Bank; gains to trade; liquidity trap; collateral; default; crash; Taylor rule; deflation; bubble; rational exuberance; heterogenous belief.;
Find related papers by JEL classification:
- D50 - Microeconomics - - General Equilibrium and Disequilibrium - - - General
- E40 - Macroeconomics and Monetary Economics - - Money and Interest Rates - - - General
- E44 - Macroeconomics and Monetary Economics - - Money and Interest Rates - - - Financial Markets and the Macroeconomy
- E50 - Macroeconomics and Monetary Economics - - Monetary Policy, Central Banking, and the Supply of Money and Credit - - - General
- E52 - Macroeconomics and Monetary Economics - - Monetary Policy, Central Banking, and the Supply of Money and Credit - - - Monetary Policy
- E58 - Macroeconomics and Monetary Economics - - Monetary Policy, Central Banking, and the Supply of Money and Credit - - - Central Banks and Their Policies
- G38 - Financial Economics - - Corporate Finance and Governance - - - Government Policy and Regulation
- H50 - Public Economics - - National Government Expenditures and Related Policies - - - General
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