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Estimating inflation persistence by quantile autoregression with quantile-specific unit roots

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  • Gaglianone, Wagner Piazza
  • Guillén, Osmani Teixeira de Carvalho
  • Figueiredo, Francisco Marcos Rodrigues

Abstract

In this paper we study inflation persistence, which is a key feature of inflation dynamics, related to how quickly a stationary inflation process reverts to its long-run equilibrium after a shock. Emerging economies with high inflation persistence need to adjust macroeconomic policies in a significant way to price shocks (e.g., at the cost of substantial output decrease), since these shocks can affect expectations and inflation for a much longer period. We propose a novel way to estimate inflation persistence by using a quantile autoregression (QAR) model, which allows for asymmetric dynamics and quantile-specific unit roots. An empirical exercise with Brazilian data from January 1995 to May 2017 illustrates the method. The results indicate that inflation is globally stationary, but exhibits non-stationary behavior in 28% of the observations. In addition, shocks occurring when inflation is higher seem to have greater dissipation time compared to shocks that occur when inflation is lower.

Suggested Citation

  • Gaglianone, Wagner Piazza & Guillén, Osmani Teixeira de Carvalho & Figueiredo, Francisco Marcos Rodrigues, 2018. "Estimating inflation persistence by quantile autoregression with quantile-specific unit roots," Economic Modelling, Elsevier, vol. 73(C), pages 407-430.
    • Handle: RePEc:eee:ecmode:v:73:y:2018:i:c:p:407-430
    DOI: 10.1016/j.econmod.2018.04.018
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    More about this item

    Keywords

    Inflation; Persistence; Quantile autoregression;
    All these keywords.

    JEL classification:

    • C14 - Mathematical and Quantitative Methods - - Econometric and Statistical Methods and Methodology: General - - - Semiparametric and Nonparametric Methods: General
    • C22 - Mathematical and Quantitative Methods - - Single Equation Models; Single Variables - - - Time-Series Models; Dynamic Quantile Regressions; Dynamic Treatment Effect Models; Diffusion Processes
    • E31 - Macroeconomics and Monetary Economics - - Prices, Business Fluctuations, and Cycles - - - Price Level; Inflation; Deflation

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