Mildly explosive autoregression under weak and strong dependence

Tassos Magdalinos

Discussion Papers from University of Nottingham, Granger Centre for Time Series Econometrics

Abstract: A limit theory is developed for mildly explosive autoregression under both weakly and strongly dependent innovation errors. We find that the asymptotic behaviour of the sample moments is affected by the memory of the innovation process both in the in the form of the limiting distribution and, in the case of long range dependence, in the rate of convergence. However, this effect is not present in least squares regression theory as it is cancelled out by the interaction between the sample moments. As a result, the Cauchy regression theory of Phillips and Magdalinos (2007a) is invariant to the dependence structure of the innovation sequence even in the long memory case.

Keywords: Central limit theory; explosive autoregression; long memory; Cauchy distribution (search for similar items in EconPapers)
Date: 2008-05
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