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On model ambiguity and money neutrality

  • Lioui, Abraham
  • Poncet, Patrice

We solve for the equilibrium of a stochastic neo-classical continuous time model without and with money under model ambiguity. We show that: (i) the correction for ambiguity stemming from the money supply is nil at equilibrium; (ii) money is neutral with respect to the stock market equilibrium (the equity risk premium); (iii) money is not neutral with respect to consumption and capital accumulation, and its effect may be quantitatively substantial; (iv) the preference for model robustness affects all the real economic variables as well as the expected inflation rate and the nominal interest rate.

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Article provided by Elsevier in its journal Journal of Macroeconomics.

Volume (Year): 34 (2012)
Issue (Month): 4 ()
Pages: 1020-1033

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Handle: RePEc:eee:jmacro:v:34:y:2012:i:4:p:1020-1033
Contact details of provider: Web page: http://www.elsevier.com/locate/inca/622617

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  1. Larry G. Epstein & Martin Schneider, 2007. "Learning Under Ambiguity," Review of Economic Studies, Oxford University Press, vol. 74(4), pages 1275-1303.
  2. Mehra, Rajnish & Prescott, Edward C., 1985. "The equity premium: A puzzle," Journal of Monetary Economics, Elsevier, vol. 15(2), pages 145-161, March.
  3. Richard Dennis & Kai Leitemo & Ulf Soderstrom, 2006. "Methods for Robust Control," Working Papers 307, IGIER (Innocenzo Gasparini Institute for Economic Research), Bocconi University.
  4. Takeshi Kimura & Takushi Kurozumi, 2003. "Optimal monetary policy in a micro-founded model with parameter uncertainty," Finance and Economics Discussion Series 2003-67, Board of Governors of the Federal Reserve System (U.S.).
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  8. Leitemo, Kai & Söderström , Ulf, 2004. "Robust monetary policy in the New-Keynesian framework," Research Discussion Papers 31/2004, Bank of Finland.
  9. Oreste Tristani, 2009. "Model Misspecification, the Equilibrium Natural Interest Rate, and the Equity Premium," Journal of Money, Credit and Banking, Blackwell Publishing, vol. 41(7), pages 1453-1479, October.
  10. Hansen, Lars Peter & Sargent, Thomas J. & Turmuhambetova, Gauhar & Williams, Noah, 2006. "Robust control and model misspecification," Journal of Economic Theory, Elsevier, vol. 128(1), pages 45-90, May.
  11. Sergio Rebelo & Danyang Xie, 1997. "On the Optimality of Interest Rate Smoothing," NBER Working Papers 5947, National Bureau of Economic Research, Inc.
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  13. Correia, Isabel & Nicolini, Juan Pablo & Teles, Pedro, 2003. "Optimal Fiscal and Monetary Policy: Equivalence Results," CEPR Discussion Papers 3730, C.E.P.R. Discussion Papers.
  14. Wada, Kenji, 2007. "The Knightian uncertainty and the risk premium and the risk free rate puzzles in Japan and the U.S," Economics Letters, Elsevier, vol. 95(3), pages 386-393, June.
  15. Evan W. Anderson & Lars Peter Hansen & Thomas J. Sargent, 2003. "A Quartet of Semigroups for Model Specification, Robustness, Prices of Risk, and Model Detection," Journal of the European Economic Association, MIT Press, vol. 1(1), pages 68-123, 03.
  16. Gilboa, Itzhak & Schmeidler, David, 1989. "Maxmin expected utility with non-unique prior," Journal of Mathematical Economics, Elsevier, vol. 18(2), pages 141-153, April.
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  18. Pascal J. Maenhout, 2004. "Robust Portfolio Rules and Asset Pricing," Review of Financial Studies, Society for Financial Studies, vol. 17(4), pages 951-983.
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