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- W3141323677 abstract "We consider estimation and testing infinite-order autoregressive models with a (near) unit root and infinite-variance innovations. We study the asymptotic properties of estimators obtained by dummying out ?large?innovations, i.e., exceeding a given threshold. These estimators reflect the common practice of dealing with large residuals by including impulse dummies in the estimated regression. Iterative versions of the dummy-variable estimator are also discussed. We provide conditions on the preliminary parameter estimator and on the threshold which ensure that (i) the dummy-based estimator is consistent at higher rates than the OLS estimator, (ii) an asymptotically normal test statistic for the unit root hypothesis can be derived, and (iii) order of magnitude gains of local power are obtained." @default.
- W3141323677 created "2021-04-13" @default.
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- W3141323677 date "2013-01-01" @default.
- W3141323677 modified "2023-09-26" @default.
- W3141323677 title "Exploiting infinite variance through Dummy Variables in non-stationary autoregressions" @default.
- W3141323677 hasPublicationYear "2013" @default.
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