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Commentaries on "Unit root testing in practice : dealing with uncertainty over the trend and inital condition," by David I. Harvey, Stephen J. Leybourne and A. M. Robert Taylor
Marsh, Patrick W. N., (2009)
The available information for invariant tests of a unit root
Marsh, Patrick W. N., (2007)
Transformations for multivariate statistics
Marsh, Patrick W. N., (2004)