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Testing for Group-Wise Convergence with an Application to Euro Area Inflation

  • Lopez, Claude
  • Papell, David

We propose a new procedure to increase the power of panel unit root tests when used to study group-wise convergence. When testing for stationarity of the differential between a group of series and their cross-sectional means, although each differential has non-zero mean, the group of differentials has a cross-sectional average of zero for each time period by construction. We incorporate this constraint for estimation and generating finite sample critical values. Applying this new procedure to Euro Area inflation, we find strong evidence of convergence among the inflation rates soon after the implementation of the Maastricht treaty and a dramatic decrease in the persistence of the differential after the occurrence of the single currency.

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Paper provided by University Library of Munich, Germany in its series MPRA Paper with number 20585.

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Date of creation: 2010
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Handle: RePEc:pra:mprapa:20585
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