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Steve Cook
''Non-linear unit root testing in the presence of heavy-tailed innovation processes''
( 2008, Vol. 3 No.38 )
The literature concerning the impact of heavy-tailed innovations upon unit root tests is extended via analysis of the finite-sample distribution and size of the non-linear unit of Kapetanios et al. (2003) in the presence of alternative finite and infinite variance innovation processes. Simulation results obtained show the test to exhibit a degree of oversizing far in excess of that previously noted for the linear Dickey-Fuller (1979) test.
Keywords: heavy-tailed distributions
JEL: C2 - Single Equation Models; Single Variables: General
Manuscript Received : Jul 18 2008 Manuscript Accepted : Jul 26 2008

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