Abstract
We consider the null hypothesis that a time series has a unit root with possibly nonzero drift against the alternative that the process is «trend-stationary». The interest is that we allow under both the null and alternative hypotheses for the presence for a one-time change in the level or in the slope of the trend function. We show how standard tests of the unit root hypothesis against trend stationary alternatives cannot reject the unit root hypothesis if the true data generating mechanism is that of stationary fluctuations around a trend function which contains a one-time break
Keywords
Unit rootCrashShock (circulatory)EconomicsOil priceRoot (linguistics)EconometricsEnvironmental scienceMonetary economicsComputer sciencePhilosophyMedicine
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Publication Info
- Year
- 1989
- Type
- article
- Volume
- 57
- Issue
- 6
- Pages
- 1361-1361
- Citations
- 7549
- Access
- Closed
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Cite This
Pierre Perrón
(1989).
The Great Crash, the Oil Price Shock, and the Unit Root Hypothesis.
Econometrica
, 57
(6)
, 1361-1361.
https://doi.org/10.2307/1913712
Identifiers
- DOI
- 10.2307/1913712