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How persistent is South Africa's inflation

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  • Logan Rangasamy

Abstract

An estimate of the persistence of inflation captures the long-run effects of a shock on inflation. A better understanding of the persistence of inflation can be useful for a variety of reasons. Firstly, a persistence measure can provide important information about the likely impact of shocks on the economy over time. This information can be extremely useful for the purpose of setting monetary policy, especially in a small, open economy like South Africa. Secondly, estimates of persistence over time can shed some light on the performance of monetary policy under different policy regimes. Finally, persistence estimates could assist in the identification of underlying inflationary pressures in the economy. This paper addresses these three issues with a reference to the South African experience. There are basically three main conclusions that emanate from the results in this paper. Firstly, there has been a significant decline in the persistence of inflation in South Africa. This decline occurred during the inflation targeting (IT) regime which suggests that IT provided a good anchor for inflationary expectations, despite the economy being subject to sizable external shocks during this period. Secondly, inflation at the disaggregate level is lower than at the aggregate level. This implies that the impact of external shocks on aggregate inflation will depend on each commodity’s level of inflation persistence as well as its weight in the consumption basket. Finally, a core measure of inflation, which considers both the persistence of inflation at the disaggregate level as well as the weight of the commodity in the consumption basket, does a better job in identifying the underlying inflationary pressures in the economy when compared to the other more readily available core measures. This measure may thus be a useful addition to the range of indicators considered for policy-making purposes.

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Bibliographic Info

Paper provided by Economic Research Southern Africa in its series Working Papers with number 115.

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Date of creation: 2009
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Handle: RePEc:rza:wpaper:115

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  1. Ian Babetskii & Fabrizio Coricelli & Roman Horvath, 2007. "Measuring and Explaining Inflation Persistence: Disaggregate Evidence on the Czech Republic," Working Papers 2007/1, Czech National Bank, Research Department.
  2. Hamilton, James D., 1990. "Analysis of time series subject to changes in regime," Journal of Econometrics, Elsevier, vol. 45(1-2), pages 39-70.
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Cited by:
  1. Ellyne, Mark & Veller, Carl, 2011. "What is the SARB's inflation targeting policy, and is it appropriate?," MPRA Paper 42134, University Library of Munich, Germany.
  2. Amusa, Kafayat & Gupta, Rangan & Karolia, Shaakira & Simo-Kengne, Beatrice D., 2013. "The long-run impact of inflation in South Africa," Journal of Policy Modeling, Elsevier, vol. 35(5), pages 798-812.

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