IDEAS home Printed from
   My bibliography  Save this article

Testing Purchasing Power Parity in Romania using standard unit root tests, with one structural break and cointegration analysis


  • Nicolae Ghiba

    () (Alexandru Ioan Cuza” University of Iași, Romania)

  • Diana Sadoveanu

    () (Alexandru Ioan Cuza” University of Iași, Romania)


In this paper we aim to analyze the long-run validity of the Purchasing Power Parity (PPP) hypothesis for the Romanian exchange rate. Our goal is achieved using Zivot-Andrews test with one structural break in order to identify changes in real exchange rate compared with traditional tests like Augmented Dickey-Fuller and Phillips-Perron and cointegration analysis in order to identify the long-run relationship between exchange rate and domestic and foreign prices. Real exchange rate stationarity implies that a shock it is absorbed in time and PPP holds in long-run. If nominal exchange rate and prince indices are non-stationary we verify if the variables are cointegrated as PPP weak form and symmetry and proportionality conditions as PPP strong form. We identify evidence of cointegration for all three models, but we don’t find any evidence to support symmetry and proportionality condition for PPP strong form case. Also, we use three different price indices: consumer price index, consumer price index without regulated prices and industrial producer price index in order to identify which indices is more relevant for our analysis. The monthly data cover the 2001M01-2011M09 period. The empirical analysis provided mixed results depending on the used price index and methodology.

Suggested Citation

  • Nicolae Ghiba & Diana Sadoveanu, 2012. "Testing Purchasing Power Parity in Romania using standard unit root tests, with one structural break and cointegration analysis," Romanian Economic Journal, Department of International Business and Economics from the Academy of Economic Studies Bucharest, vol. 15(44), pages 225-242, June.
  • Handle: RePEc:rej:journl:v:15:y:2012:i:44:p:225-242

    Download full text from publisher

    File URL:
    Download Restriction: no


    Citations are extracted by the CitEc Project, subscribe to its RSS feed for this item.

    Cited by:

    1. Ntokozo Patrick Nzimande & Marcel Kohler, 2016. "On the Validity of Purchasing Power Parity: Evidence from Energy Exporting Sub-Saharan Africa Countries," SPOUDAI Journal of Economics and Business, SPOUDAI Journal of Economics and Business, University of Piraeus, vol. 66(3), pages 71-82, July-Sept.

    More about this item


    purchasing power parity; real exchange rate; stationarity; cointegration;

    JEL classification:

    • F31 - International Economics - - International Finance - - - Foreign Exchange
    • C32 - Mathematical and Quantitative Methods - - Multiple or Simultaneous Equation Models; Multiple Variables - - - Time-Series Models; Dynamic Quantile Regressions; Dynamic Treatment Effect Models; Diffusion Processes; State Space Models
    • E31 - Macroeconomics and Monetary Economics - - Prices, Business Fluctuations, and Cycles - - - Price Level; Inflation; Deflation


    Access and download statistics


    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:rej:journl:v:15:y:2012:i:44:p:225-242. See general information about how to correct material in RePEc.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: (Radu Lupu). General contact details of provider: .

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    We have no references for this item. You can help adding them by using this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service hosted by the Research Division of the Federal Reserve Bank of St. Louis . RePEc uses bibliographic data supplied by the respective publishers.