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Tests Against Stationary and Explosive Alternatives in Vector Autoregressive Models

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Author Info
Ahlgren, Niklas () (Swedish School of Economics and Business Administration)
Nyblom, Jukka () (University of Joensuu)
Abstract

The article proposes new tests for the number of unit roots in vector autoregressive models based on the eigenvalues of the companion matrix. Both stationary and explosive alternatives are considered. The limiting distributions of test statistics depend only on the number of unit roots. Size and power are investigated and it is found that the new test against stationary alternatives compares favorably with the widely used likelihood ratio test for the cointegrating rank. The powers are prominently higher against explosive than stationary alternatives. Some empirical examples are provided to show how to use the new tests with real data.

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Publisher Info
Paper provided by Hanken School of Economics in its series Working Papers with number 511.

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Length: 38 pages
Date of creation: 14 Dec 2005
Date of revision:
Handle: RePEc:hhb:hanken:0511

Note: This paper is published as: Ahlgren, Niklas and Nyblom, Jukka (2008), 'Tests against Stationary and Explosive Alternatives in Vector Autoregressive Models', Journal of Time Series Analysis, 29, 421-443.
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Postal: Hanken School of Economics, Arkadiankatu 22, P.O.B. 479; FIN 00101 Helsinki, Finland
Phone: +358-9-431 331
Fax: +358-9-431 33 333
Web page: http://www.hanken.fi
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Related research
Keywords: Asymptotic local power; Cointegration; Companion matrix; Unit root;

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References listed on IDEAS
Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.:
  1. Johansen, Soren, 1988. "Statistical analysis of cointegration vectors," Journal of Economic Dynamics and Control, Elsevier, vol. 12(2-3), pages 231-254. [Downloadable!] (restricted)
  2. Nielsen, Bent, 2001. "The Asymptotic Distribution of Unit Root Tests of Unstable Autoregressive Processes," Econometrica, Econometric Society, vol. 69(1), pages 211-19, January.
  3. Katarina Juselius & Zorica Mladenovic, 2002. "High Inflation, Hyperinflation and Explosive Roots. The Case of Yugoslavia," Discussion Papers 02-23, University of Copenhagen. Department of Economics. [Downloadable!]
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