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Structural breaks and unit root: evidence from Pakistani macroeconomic time series

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  • Waheed, Muhammad
  • Alam, Tasneem
  • Ghauri, Saghir Pervaiz

Abstract

The purpose of this paper is to examine the unit root properties of eleven Pakistani macroeconomic series using annual data. Along with traditional unit root tests, we use the procedure developed by Zivot and Andrews to test the null of unit root against the break-stationary alternative. Conventional unit root tests indicate that all variable are non-stationary at the levels. Results from Zivot and Andrews test suggest that we can reject the null of unit root for CPI and WPI at 5 percent significance level while we fail to reject the unit root hypothesis for the remaining 9 series. At the same time, the Zivot and Andrews test identifies endogenously the point of the single most significant structural break in every time series examined. The results show that ten of the eleven series studied bear witness to the presence of a structural break during the period 1972 to 1976.

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Paper provided by University Library of Munich, Germany in its series MPRA Paper with number 1797.

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Date of creation: 15 Dec 2006
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Handle: RePEc:pra:mprapa:1797

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Keywords: Structural break; unit root; pakistan;

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  1. Nelson, Charles R. & Plosser, Charles I., 1982. "Trends and random walks in macroeconmic time series : Some evidence and implications," Journal of Monetary Economics, Elsevier, vol. 10(2), pages 139-162.
  2. Elliott, Graham & Rothenberg, Thomas J & Stock, James H, 1996. "Efficient Tests for an Autoregressive Unit Root," Econometrica, Econometric Society, vol. 64(4), pages 813-36, July.
  3. Ben-David, Dan & Papell, David, 1995. "Slowdowns and Meltdowns: Post-war Growth Evidence from 74 Countries," CEPR Discussion Papers 1111, C.E.P.R. Discussion Papers.
  4. Zivot, Eric & Andrews, Donald W K, 2002. "Further Evidence on the Great Crash, the Oil-Price Shock, and the Unit-Root Hypothesis," Journal of Business & Economic Statistics, American Statistical Association, vol. 20(1), pages 25-44, January.
  5. Lawrence J. Christiano & Martin Eichenbaum, 1989. "Unit roots in real GNP: do we know, and do we care?," Discussion Paper / Institute for Empirical Macroeconomics 18, Federal Reserve Bank of Minneapolis.
  6. Perron, P., 1990. "Further Evidence On Breaking Trend Functions In Macroeconomics Variables," Papers 350, Princeton, Department of Economics - Econometric Research Program.
  7. Cooper, Suzanne & Piehl, Anne Morrison & Braga, Anthony & Kennedy, David, 2001. "Testing for Structural Breaks in the Evaluation of Programs," Working Paper Series rwp01-019, Harvard University, John F. Kennedy School of Government.
  8. Lawrence J. Christiano, 1988. "Searching For a Break in GNP," NBER Working Papers 2695, National Bureau of Economic Research, Inc.
  9. Chaudhuri, Kausik & Wu, Yangru, 2003. "Random walk versus breaking trend in stock prices: Evidence from emerging markets," Journal of Banking & Finance, Elsevier, vol. 27(4), pages 575-592, April.
  10. Laurence Ball, 1993. "The Dynamics of High Inflation," NBER Working Papers 4578, National Bureau of Economic Research, Inc.
  11. Sen, Amit, 2003. "On Unit-Root Tests When the Alternative Is a Trend-Break Stationary Process," Journal of Business & Economic Statistics, American Statistical Association, vol. 21(1), pages 174-84, January.
  12. PareshKumar Narayan & Russell Smyth, 2005. "Structural Breaks And Unit Roots In Australian Macroeconomic Time Series," Pacific Economic Review, Wiley Blackwell, vol. 10(4), pages 421-437, December.
  13. Banerjee, Anindya & Lumsdaine, Robin L & Stock, James H, 1992. "Recursive and Sequential Tests of the Unit-Root and Trend-Break Hypotheses: Theory and International Evidence," Journal of Business & Economic Statistics, American Statistical Association, vol. 10(3), pages 271-87, July.
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Cited by:
  1. Nyong, M. O. & Udah, E. B., 2012. "Industrial Time Series of Nigeria, 1970-2009: Evolution and Unit Root Testing in the Presence of Multiple Endogenous Structural Breaks," Applied Econometrics and International Development, Euro-American Association of Economic Development, vol. 12(1).
  2. Khan, Mashrur Mustaque & Yousuf, Ahmed Sadek, 2013. "Macroeconomic Forces and Stock Prices:Evidence from the Bangladesh Stock Market," MPRA Paper 46528, University Library of Munich, Germany.
  3. Miguel Ramirez, 2011. "Remittance Flows and Economic Growth in Mexico: A Single Break Unit Root and Cointegration Analysis, 1970-2009," Working Papers 1106, Trinity College, Department of Economics.
  4. Miguel Ramirez, 2013. "Is Foreign Direct Investment Beneficial for Mexico? A Cointegration Analysis, 1958-2010," Working Papers 1311, Trinity College, Department of Economics.

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