Unit Roots in Time Series Models: Tests and Implications
- 1 February 1986
- journal article
- research article
- Published by Taylor & Francis in The American Statistician
- Vol. 40 (1) , 12-26
- https://doi.org/10.1080/00031305.1986.10475349
Abstract
The decision on whether or not to include a unit root in an autoregressive operator has profound implications. Formal tests for the presence of unit roots give analysts objective guidance in this decision. This article is a practical guide to the use of these tests.Keywords
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