1988
DOI: 10.1214/aos/1176350711
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Limiting Distributions of Least Squares Estimates of Unstable Autoregressive Processes

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Cited by 532 publications
(345 citation statements)
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“…These results are in line with those developed in Chan and Wei (1988), in which limiting distributions of the least squares estimator were considered. On the other hand, it is worth mentioning that the (normalized) regressors and the (normalized) estimators used for prediction are not asymptotically independent in nonstationary autoregressions; see Ing and Sin (2006) for simple random walk models.…”
Section: Moment Bounds For the Inverse Of The Normalized Fisher Inforsupporting
confidence: 91%
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“…These results are in line with those developed in Chan and Wei (1988), in which limiting distributions of the least squares estimator were considered. On the other hand, it is worth mentioning that the (normalized) regressors and the (normalized) estimators used for prediction are not asymptotically independent in nonstationary autoregressions; see Ing and Sin (2006) for simple random walk models.…”
Section: Moment Bounds For the Inverse Of The Normalized Fisher Inforsupporting
confidence: 91%
“…When d ≥ 1 and sup 0<t<∞ E|ε t | q < ∞, q > 2, following the arguments used in Phillips (1987) and Chan and Wei (1988), it can be shown that )) . However, the limiting value of E(N f 2 1,n (d)) remains unclear.…”
Section: Asymptotic Expressions For the Mspementioning
confidence: 99%
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“…In all cases, the differences of V, are assumed to be strong mixing. The first example assumes that the differences of U, are strong mixing, which has applications in the theory of multivariate unit roots [4] and cointegration among I(1) variables [8,12]. The second example assumes that U, is the product of processes whose differences are strong mixing, which has applications in the theory of heteroskedastic cointegration [6] and nonstationary variances [7].…”
Section: Introductionmentioning
confidence: 99%
“…errors. Some related results on estimating and testing unit roots can be found in Phillips and Durlauf (1986), Phillips (1987), Chan and Wei (1988), Lucas (1995), and Herce (1996), and the references cited therein. When the error term follows a GARCH process, estimation and testing for a unit root involves intrinsic problems, an issue that was first raised by Pantula (1989).…”
Section: Introductionmentioning
confidence: 99%