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Unit-Root Tests and the Statistical Pitfalls of Seasonal Adjustment: The Case of U.S. Postwar Real Gross National Product

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  • Ghysels, Eric

Abstract

Unit-root tests applied to the postwar seasonally adjusted quarterly gross national product series strongly support the null hypothesis of the presence of a unit root in the data-generating process. Evidence reported here with seasonally unadjusted data is far less conclusive. It is explained why seasonal-adjustment procedures may alter the outcome of conventional tests.

Suggested Citation

  • Ghysels, Eric, 1990. "Unit-Root Tests and the Statistical Pitfalls of Seasonal Adjustment: The Case of U.S. Postwar Real Gross National Product," Journal of Business & Economic Statistics, American Statistical Association, vol. 8(2), pages 145-152, April.
  • Handle: RePEc:bes:jnlbes:v:8:y:1990:i:2:p:145-52
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    Cited by:

    1. Ignacio Mauleón & Mª Mar Sánchez, 2000. "Fundamentals Of The Us And The Uk Interest Rates Under The Rational Expectation Scheme," Working Papers. Serie AD 2000-20, Instituto Valenciano de Investigaciones Económicas, S.A. (Ivie).
    2. Artur Silva Lopes, 2006. "Deterministic seasonality in Dickey–Fuller tests: should we care?," Empirical Economics, Springer, vol. 31(1), pages 165-182, March.
    3. Groen, Jan J. J., 2000. "The monetary exchange rate model as a long-run phenomenon," Journal of International Economics, Elsevier, vol. 52(2), pages 299-319, December.
    4. Oleg Obrezkov, 2007. "Long range dependence and the purchasing power parity (in Russian)," Quantile, Quantile, issue 2, pages 131-140, March.
    5. Sriram, Subramanian S., 2002. "Determinants and stability of demand for M2 in Malaysia," Journal of Asian Economics, Elsevier, vol. 13(3), pages 337-356.
    6. Tomas Barrio Castro & Mariam Camarero & Cecilio Tamarit, 2015. "An analysis of the trade balance for OECD countries using periodic integration and cointegration," Empirical Economics, Springer, vol. 49(2), pages 389-402, September.
    7. Muhd-Zulkhibri Abdul Majid, 2004. "Reassessing The Stability of Broad Money Demand in Malaysia," Macroeconomics 0405020, EconWPA.
    8. Caraballo Pou, M. Angeles & Dabus, Carlos, 2008. "Nominal rigidities, skewness and inflation regimes," Research in Economics, Elsevier, vol. 62(1), pages 16-33, March.
    9. Jesus Otero & Jeremy Smith, 2002. "Seasonal adjustment and cointegration," BORRADORES DE INVESTIGACIÓN 003483, UNIVERSIDAD DEL ROSARIO.
    10. Ghysels, Éric, 1994. "L’analyse économétrique et la saisonnalité," L'Actualité Economique, Société Canadienne de Science Economique, vol. 70(1), pages 43-62, mars.
    11. repec:gam:jecnmx:v:5:y:2017:i:4:p:48-:d:117025 is not listed on IDEAS
    12. Choudhry, Taufiq, 1995. "High inflation rates and the long-run money demand function: Evidence from cointegration tests," Journal of Macroeconomics, Elsevier, vol. 17(1), pages 77-91.
    13. Raimundo Soto M. & Matías Tapia G., 2000. "Seasonal Cointegration in Money Demand," Journal Economía Chilena (The Chilean Economy), Central Bank of Chile, vol. 3(3), pages 57-71, December.
    14. Mendez Parra, Maximiliano, 2015. "Seasonal Unit Roots and Structural Breaks in agricultural time series: Monthly exports and domestic supply in Argentina," MPRA Paper 63831, University Library of Munich, Germany, revised 06 Apr 2015.
    15. Alain Hecq & Sean Telg & Lenard Lieb, 2017. "Do Seasonal Adjustments Induce Noncausal Dynamics in Inflation Rates?," Econometrics, MDPI, Open Access Journal, vol. 5(4), pages 1-22, October.
    16. Mª Ángeles Caraballo Pou & Carlos Dabús, 2005. "Nominal rigidities, relative prices and skewness," Economic Working Papers at Centro de Estudios Andaluces E2005/17, Centro de Estudios Andaluces.
    17. Méndez Parra, Maximiliano, 2015. "Futures prices, trade and domestic supply of agricultural commodities," Economics PhD Theses 0115, Department of Economics, University of Sussex.
    18. Raimundo Soto & Matías Tapia, 2001. "Seasonal cointegration and the stability of the demand for money," Working Papers Central Bank of Chile 103, Central Bank of Chile.

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