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Modelling New Zealand inflation in a Phillips curve

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  • David Hargreaves
  • Hannah Kite
  • Bernard Hodgetts

    (Reserve Bank of New Zealand)

Abstract

This article presents some simple estimates of Phillips curves for New Zealand inflation and outlines a recent reorganisation of the inflation process in the Reserve Bank's Forecasting and Policy System (FPS). While modern economic theory suggests the traditional Phillips curve should be used only with care, empirical estimates for New Zealand suggest it continues to have some value. We find that estimates of the impact of resource pressure (the "output gap") on inflation are easiest to obtain from an equation on the non-tradables component of CPI inflation, and show that this relationship can be improved statistically by introducing a (fairly smooth) measure of inflation expectations on the right hand side. We present some evidence that the relationship between resource pressures and non-tradables inflation is stronger in New Zealand than some comparable countries, and further evidence that this could be related to the cyclicality of housing construction costs in New Zealand. In the latest version of the Reserve Bank's macro-model, FPS, the inflation process has been written with a tradables/non-tradables split and an explicit empirical measure of inflation expectations. This does not greatly change model properties but allows the model's congruence with the data to be assessed more directly.

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Bibliographic Info

Article provided by Reserve Bank of New Zealand in its journal Reserve Bank of New Zealand Bulletin.

Volume (Year): 69 (2006)
Issue (Month): (September)
Pages:

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Handle: RePEc:nzb:nzbbul:september2006:3

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  1. Paul Conway & Ben Hunt, 1997. "Estimating potential output: a semi-structural approach," Reserve Bank of New Zealand Discussion Paper Series G97/9, Reserve Bank of New Zealand.
  2. Bernard Hodgetts, 2006. "Changes in the inflation process in New Zealand," Reserve Bank of New Zealand Bulletin, Reserve Bank of New Zealand, vol. 69, pages 30p., March.
  3. James Twaddle & Florin Citu, 2003. "The output gap and its role in monetary policy decision-making," Reserve Bank of New Zealand Bulletin, Reserve Bank of New Zealand, vol. 66, March.
  4. Michael Graff, 2004. "Estimates of the output gap in real time: how well have we been doing?," Reserve Bank of New Zealand Discussion Paper Series DP 2004/04, Reserve Bank of New Zealand.
  5. Tim Hampton, 2001. "How much do import price shocks matter for consumer prices?," Reserve Bank of New Zealand Discussion Paper Series DP2001/06, Reserve Bank of New Zealand.
  6. David Laidler, 2001. "Phillips in Retrospect," UWO Department of Economics Working Papers 20013, University of Western Ontario, Department of Economics.
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Cited by:
  1. Phil Briggs, 2007. "Lessons learned from the Economics Department's research work on household balance sheets and related issues," Reserve Bank of New Zealand Bulletin, Reserve Bank of New Zealand, vol. 70, December.
  2. Aleksejs Melihovs & Anna Zasova, 2007. "Estimation of the Phillips Curve for Latvia," Working Papers 2007/03, Latvijas Banka.
  3. Adolfo Sachsida & Marcio Ribeiro & Claudio Hamilton dos Santos, 2009. "A Curva de Phillips e a Experiência Brasileira," Discussion Papers 1429, Instituto de Pesquisa Econômica Aplicada - IPEA.
  4. Sharon McCaw, 2007. "Stylised facts about New Zealand business cycles," Reserve Bank of New Zealand Discussion Paper Series DP2007/04, Reserve Bank of New Zealand.
  5. Michael Ryan & Kam Leong Szeto, 2009. "An Introduction to the New Zealand Treasury Model," Treasury Working Paper Series 09/02, New Zealand Treasury.
  6. Özer Karagedikli & Rishab Sethi & Christie Smith & Aaron Drew, 2008. "Changes in the transmission mechanism of monetary policy in New Zealand," Reserve Bank of New Zealand Discussion Paper Series DP2008/03, Reserve Bank of New Zealand.
  7. Jacek Krawczyk & Rishab Sethi, 2007. "Satisficing Solutions for New Zealand Monetary Policy," Reserve Bank of New Zealand Discussion Paper Series DP2007/03, Reserve Bank of New Zealand.
  8. Aaron Drew, 2007. "New Zealand's productivity performance and prospects," Reserve Bank of New Zealand Bulletin, Reserve Bank of New Zealand, vol. 70, March.

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