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Journal ArticleDOI

The Great Crash, the Oil Price Shock, and the Unit Root Hypothesis

Pierre Perron
- 01 Nov 1989 - 
- Vol. 57, Iss: 6, pp 1361-1401
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TLDR
In this paper, the authors 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" and 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.
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

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Citations
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Journal ArticleDOI

Accounting for real and nominal exchange rate movements in the post-bretton woods period

TL;DR: In this paper, the authors decompose real and nominal exchange rate movements into the components induced by real, rather than supply, factors, and show that real demand, not supply, is responsible for exchange rate fluctuations.
Journal ArticleDOI

Testing for a unit root in the presence of a variance shift

TL;DR: In this article, the authors examined the effects of shifts in variance on the unit root test and derived the limiting distribution of the test statistic and Monte Carlo experiment evidence on the finite sample.
Journal ArticleDOI

The Dynamic Effects of Aggregate Demand, Supply and Oil Price Shocks—A Comparative Study

TL;DR: In this article, the dynamic effects of aggregate demand, supply and oil price shocks on GDP and unemployment in Germany, Norway, the UK and the USA were analyzed, and the role of the different shocks in explaining output fluctuations over time was established.
Journal ArticleDOI

Testing the Tourism-Led Growth hypothesis: The case of Malta

TL;DR: In this paper, the authors employ the bounds test for co-integration and Granger causality tests to investigate level relationship and the direction of causality between international tourism and economic growth in the case of Malta.
Book ChapterDOI

Testing for a Unit Root in the Presence of a Maintained Trend

TL;DR: The authors developed statistics for detecting the presence of a unit root in time series data against the alternative of stationarity, and applied them to a number of models of macroeconomic behavior, including a wide class of weakly dependent and possibly heterogenously distributed errors.
References
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Journal ArticleDOI

Co-integration and Error Correction: Representation, Estimation and Testing

TL;DR: The relationship between co-integration and error correction models, first suggested in Granger (1981), is here extended and used to develop estimation procedures, tests, and empirical examples.
Journal ArticleDOI

Distribution of the Estimators for Autoregressive Time Series with a Unit Root

TL;DR: In this article, the limit distributions of the estimator of p and of the regression t test are derived under the assumption that p = ± 1, where p is a fixed constant and t is a sequence of independent normal random variables.
Journal ArticleDOI

Testing for a Unit Root in Time Series Regression

TL;DR: In this article, the authors proposed new tests for detecting the presence of a unit root in quite general time series models, which accommodate models with a fitted drift and a time trend so that they may be used to discriminate between unit root nonstationarity and stationarity about a deterministic trend.
Book

Convergence of Probability Measures

TL;DR: Weak Convergence in Metric Spaces as discussed by the authors is one of the most common modes of convergence in metric spaces, and it can be seen as a form of weak convergence in metric space.
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