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Testing the Null of Co-integration in the Presence of Variance Breaks

  • Giuseppe Cavaliere and A M Robert Taylor

We show that changes in the innovation covariance matrix of a vector of series can generate spurious rejections of the null hypothesis of co-integration when applying standard residual-based co-integration tests. A bootstrap solution to the inference problem is suggested which is shown to perform well in practice, redressing the size problems associated with the standard test but not losing power relative to the standard test under the alternative.

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Paper provided by Department of Economics, University of Birmingham in its series Discussion Papers with number 05-10.

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Length: 24 pages
Date of creation: Apr 2005
Date of revision:
Handle: RePEc:bir:birmec:05-10
Contact details of provider: Postal: Edgbaston, Birmingham, B15 2TT
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