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Optimal Monetary Policy with Collateralized Household Debt and Borrowing Constraints

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  • Tommaso Monacelli

Abstract

We study optimal monetary policy in an economy with nominal private debt, borrowing constraints and price rigidity. Private debt reflects equilibrium trade between an impatient borrower, who faces an endogenous collateral constraint, and a patient saver, who engages in consumption smoothing. Since inflation can positively affect borrower's net worth, monetary policy optimally balances the incentive to offset the price stickiness distortion with the one of marginally relaxing the borrower's collateral constraint. We find that the optimal volatility of inflation is increasing in three key parameters: (i) the borrower's weight in the planner's objective function; (ii) the borrower's impatience rate; (iii) the degree of price flexibility. In general, however, deviations from price stability are small for a small degree of price stickiness. In a two-sector version of our model, in which durable price movements can directly affect the ability of borrowing, the optimal volatility of (non-durable) inflation is more sizeable. In our context, and relative to simple Taylor rules, the Ramsey-optimal allocation entails a partial smoothing of real durable goods prices.

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Bibliographic Info

Paper provided by National Bureau of Economic Research, Inc in its series NBER Working Papers with number 12470.

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Date of creation: Aug 2006
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Publication status: published as Campbell, John (ed.) Asset Prices and Monetary Policy. Chicago: University of Chicago Press, 2008.
Handle: RePEc:nbr:nberwo:12470

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Cited by:
  1. Juan Pablo Medina Guzman & Ruy Lama, 2007. "Optimal Monetary Policy in a Small Open Economy Under Segmented Asset Markets and Sticky Prices," IMF Working Papers 07/217, International Monetary Fund.
  2. Nikolay Hristov & Oliver Hülsewig & Timo Wollmershäuser, 2010. "Financial Frictions and Inflation Differentials in a Monetary Union," CESifo Working Paper Series 3235, CESifo Group Munich.
  3. Tiziana Assenza & Michele Berardi & Domenico Delli Gatti, 2011. "Was Bernanke Right? Targeting Asset Prices may not be a Good Idea after all," CESifo Working Paper Series 3641, CESifo Group Munich.
  4. Kajuth, Florian, 2010. "The role of liquidity constraints in the response of monetary policy to house prices," Journal of Financial Stability, Elsevier, vol. 6(4), pages 230-242, December.
  5. Federico di Pace, 2008. "Revisiting the Comovement Puzzle: the Input-Output Structure as an Additional Solution," Birkbeck Working Papers in Economics and Finance 0807, Birkbeck, Department of Economics, Mathematics & Statistics.
  6. Stephane Auray & Paul Gomme & Shen Guo, 2012. "Nominal Rigidities, Monetary Policy and Pigou Cycles," Working Papers 12006, Concordia University, Department of Economics.
  7. Jordi Galí & Mark Gertler, 2007. "Macroeconomic modeling for monetary policy evaluation," Economics Working Papers 1039, Department of Economics and Business, Universitat Pompeu Fabra, revised Jul 2007.
  8. José Suárez-Lledó, 2009. "Monetary Policy with Heterogeneous Collateralized Borrowing," Working Papers 374, Barcelona Graduate School of Economics.
  9. Angelini, Paolo & Neri, Stefano & Panetta, Fabio, 2012. "Monetary and macroprudential policies," Working Paper Series 1449, European Central Bank.
  10. Meral Karasulu, 2008. "Stresstesting Household Debt in Korea," IMF Working Papers 08/255, International Monetary Fund.

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