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Published online by Cambridge University Press: 11 February 2009
This paper generalizes the univariate results of Chanand Tran (1989, Econometric Theory5, 354–362) and Phillips (1990, EconometricTheory 6, 44–62) to multivariate timeseries. We develop the limit theory for theleast-squares estimate of a VAR(l) for a random walkwith independent and identically distributed errorsand for I(1) processes with weakly dependent errorswhose distributions are in the domain of attractionof a stable law. The limit laws are represented byfunctional of a stable process. A semiparametriccorrection is used in order to asymptoticallyeliminate the “bias” term in the limit law. Theseresults are also an extension of the multivariatelimit theory for square-integrable disturbancesderived by Phillips and Durlauf (1986,Review of Economic Studies 53,473–495). Potential applications include tests formultivariate unit roots and cointegration.