Spurious Cointegration: The Engle-Granger Test in the Presence of Structural Breaks
Antonio Noriega () and
No 2006-12, Working Papers from Banco de México
This paper analyses the asymptotic behavior of the Engle-Granger t-test for cointegration when the data include structural breaks, instead of being pure I(1) processes. We find that the test does not possess a limiting distribution, but diverges as the sample size tends to infinity. Calculations involving the asymptotic expression of the t-test , as well as Monte Carlo simulations, reveal that the test can diverge in either direction, making it unreliable as a test for cointegration, when there are neglected breaks in the trend function of the data. Using real data on car sales and murders in the US, we present an empirical illustration of the theoretical results.
JEL-codes: C12 C13 C22 (search for similar items in EconPapers)
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