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Sequential Procedure for Testing Unit Roots in the Presence of Structural Break in Time Series Data

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Abstract

Testing for unit roots has special significance in terms of both economic theory and the interpretation of estimation results. As there are several methods available, researchers face method selection problem while conducting the unit root test on time series data in the presence of structural break. This paper proposes a sequential search procedure to determine the best test method for each time series. Different test methods or models may be appropriate for different time series. Therefore, instead of sticking to one particular test method for all the time series under consideration, selection of a set of mixed methods is recommended for obtaining better results.

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  • Shrestha, Min B. & Chowdhury, Khorshed, 2005. "Sequential Procedure for Testing Unit Roots in the Presence of Structural Break in Time Series Data," Economics Working Papers wp05-06, School of Economics, University of Wollongong, NSW, Australia.
    • Handle: RePEc:uow:depec1:wp05-06
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    6. Min Shrestha & Khorshed Chowdhury, 2007. "Testing financial liberalization hypothesis with ARDL modelling approach," Applied Financial Economics, Taylor & Francis Journals, vol. 17(18), pages 1529-1540.
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    9. Muhammad Omer & Jakob De Haan & Bert Scholtens, 2015. "An empirical analysis of excess interbank liquidity: a case study of Pakistan," Applied Economics, Taylor & Francis Journals, vol. 47(44), pages 4754-4776, March.
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    13. khan, Hafizah & Abdullah, Hussin, 2010. "Saving Determinants in Malaysia," Jurnal Ekonomi Malaysia, Faculty of Economics and Business, Universiti Kebangsaan Malaysia, vol. 44, pages 23-34.
    14. Shankar Prasad Acharya, 2009. "Verification of Causality through VAR and Intervention Analysis: Econometric Modeling on Budget Deficit and Trade Deficit in Nepal," NRB Economic Review, Nepal Rastra Bank, Economic Research Department, vol. 21, pages 1-30, April.
    15. Khorshed Chowdhury, 2011. "Dynamics, Structural Breaks and the Determinants of the Real Exchange Rate of Australia," Economics Working Papers wp11-11, School of Economics, University of Wollongong, NSW, Australia.
    16. Choon-Seng Lim & Vincent & Min B. Shrestha, 2009. "Capital Flows and Implication for Central Bank Policies in The SEACEN Countries," Research Studies, South East Asian Central Banks (SEACEN) Research and Training Centre, number rp76.
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    18. Hamid Raza & Gylfi Zoega & Stephen Kinsella, 2015. "Capital controls, financial crisis and the investment saving nexus:Evidence from Iceland," Working Papers 201518, Geary Institute, University College Dublin.

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    Keywords

    Time Series; Stationarity; Unit Root Test; Structural Break; Sequential Procedure;
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