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The time series behaviour of Brazilian inflation rate: new evidence from unit root tests with good size and power

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  • Gawon Yoon

Abstract

Various unit roots tests are suggested over the years. However, many of them suffer severe size problems as well as low power. Recently, Ng and Perron (Econometrica, 69, 1519-1554, 2001) propose new modelling strategy that yields good power and reliable size. This letter applies their testing method to the Brazilian inflation rate, which is contaminated by various government interventions to bring hyperinflation under control and for which standard unit root tests produce unintuitive results. The new method is found to yield reliable results for the current data and a possible explanation is also provided for its performance.

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  • Gawon Yoon, 2003. "The time series behaviour of Brazilian inflation rate: new evidence from unit root tests with good size and power," Applied Economics Letters, Taylor & Francis Journals, vol. 10(10), pages 627-631.
    • Handle: RePEc:taf:apeclt:v:10:y:2003:i:10:p:627-631
    DOI: 10.1080/1350485032000133309
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    1. repec:fgv:epgrbe:v:65:n:3:a:4 is not listed on IDEAS
    2. da Silva, Cleomar Gomes & Leme, Maria Carolina da Silva, 2011. "An Analysis of the Degrees of Persistence of Inflation, Inflation Expectations and Real Interest Rate in Brazil," Revista Brasileira de Economia - RBE, EPGE Brazilian School of Economics and Finance - FGV EPGE (Brazil), vol. 65(3), September.
    3. Georgios P. Kouretas & Mark E. Wohar, 2012. "The dynamics of inflation: a study of a large number of countries," Applied Economics, Taylor & Francis Journals, vol. 44(16), pages 2001-2026, June.
    4. Luis A. Gil-Alana & Andrea Mervar & James E. Payne, 2017. "The stationarity of inflation in Croatia: anti-inflation stabilization program and the change in persistence," Economic Change and Restructuring, Springer, vol. 50(1), pages 45-58, February.
    5. Arize, Augustine C. & Malindretos, John, 2012. "Nonstationarity and nonlinearity in inflation rate: Some further evidence," International Review of Economics & Finance, Elsevier, vol. 24(C), pages 224-234.
    6. Narayan, Paresh Kumar & Popp, Stephan, 2011. "An application of a new seasonal unit root test to inflation," International Review of Economics & Finance, Elsevier, vol. 20(4), pages 707-716, October.

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