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dc.contributor.authorLanne, Markkuen
dc.contributor.authorLütkepohl, Helmuten
dc.contributor.authorSaikkonen, Penttien
dc.date.accessioned2012-09-18T13:45:48Z-
dc.date.available2012-09-18T13:45:48Z-
dc.date.issued2001-
dc.identifier.piurn:nbn:de:kobv:11-10050593en
dc.identifier.urihttp://hdl.handle.net/10419/62701-
dc.description.abstractUnit root tests are considered for time series with innovational outliers. The function representing the outliers can have a very general nonlinear form and additional deterministic mean and trend terms are allowed for. Prior to the tests the deterministic parts and other nuisance parameters of the data generation process are estimated in a first step. Then the series are adjusted for these terms and unit raot tests of the Dickey-Fuller type are applied to the adjusted series. The properties of previously suggested tests of this sort are analyzed and modifications are proposed which take into account estimation errors in the nuisance parameters. An important result is that estimation under the null hypothesis is preferable to estimation under local alternatives. This contrasts with results obtained by other authors for time series without outliers. A comparison with additive outlier models is also performed.en
dc.language.isoengen
dc.publisher|aHumboldt University of Berlin, Interdisciplinary Research Project 373: Quantification and Simulation of Economic Processes |cBerlinen
dc.relation.ispartofseries|aSFB 373 Discussion Paper |x2001,82en
dc.subject.jelC22en
dc.subject.jelC12en
dc.subject.ddc330en
dc.subject.keywordUnivariate time seriesen
dc.subject.keywordunit rooten
dc.subject.keywordstructural shiften
dc.subject.keywordautoregressionen
dc.titleUnit root tests in the presence of innovational outliers-
dc.typeWorking Paperen
dc.identifier.ppn725919698en
dc.rightshttp://www.econstor.eu/dspace/Nutzungsbedingungenen
dc.identifier.repecRePEc:zbw:sfb373:200182en

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