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Monetary Policy and Business Cycles with Endogenous Entry and Product Variety

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Author Info
Florin O. Bilbiie
Fabio Ghironi
Marc J. Melitz

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Abstract

This paper studies the role of endogenous producer entry and product creation for monetary policy analysis and business cycle dynamics in a general equilibrium model with imperfect price adjustment. Optimal monetary policy stabilizes product prices, but lets the consumer price index vary to accommodate changes in the number of available products. The free entry condition links the price of equity (the value of products) with marginal cost and markups, and hence with inflation dynamics. No-arbitrage between bonds and equity links the expected return on shares, and thus the financing of product creation, with the return on bonds, affected by monetary policy via interest rate setting. This new channel of monetary policy transmission through asset prices restores the Taylor Principle in the presence of capital accumulation (in the form of new production lines) and forward-looking interest rate setting, unlike in models with traditional physical capital. We also study the implications of endogenous variety for the New Keynesian Phillips curve and business cycle dynamics more generally, and we document the effects of technology, deregulation, and monetary policy shocks, as well as the second moment properties of our model, by means of numerical examples.

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Paper provided by National Bureau of Economic Research, Inc in its series NBER Working Papers with number 13199.

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Date of creation: Jun 2007
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Handle: RePEc:nbr:nberwo:13199

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Find related papers by JEL classification:
E31 - Macroeconomics and Monetary Economics - - Prices, Business Fluctuations, and Cycles - - - Price Level; Inflation; Deflation
E32 - Macroeconomics and Monetary Economics - - Prices, Business Fluctuations, and Cycles - - - Business Fluctuations; Cycles
E52 - Macroeconomics and Monetary Economics - - Monetary Policy, Central Banking, and the Supply of Money and Credit - - - Monetary Policy

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Cited by:
(explanations, Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.)

  1. Ester Faia, 2009. "Oligopolistic Competition and Optimal Monetary Policy," Kiel Working Papers 1552, Kiel Institute for the World Economy. [Downloadable!]
  2. Florin Bilbiie & Fabio Ghironi & Marc J. Melitz, 2007. "Endogenous Entry, Product Variety, and Business Cycles," NBER Working Papers 13646, National Bureau of Economic Research, Inc. [Downloadable!] (restricted)
  3. Lewis, Vivien, 2008. "Business cycle evidence on firm entry," Discussion Paper Series 1: Economic Studies 2008,08, Deutsche Bundesbank, Research Centre. [Downloadable!]
    Other versions:
  4. Ippei Fujiwara & nd Naohisa Hirakata, 2007. "Dynamic Aspects of Productivity Spillovers, Terms of Trade and The "Home Market Effects"," IMES Discussion Paper Series 07-E-07, Institute for Monetary and Economic Studies, Bank of Japan. [Downloadable!]
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