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More powerful panel data unit root tests with an application to mean reversio...
Unit root tests, seeking mean or trend reversion, are frequently applied to panel data. We show that more powerful variants of commonly applied tests are readily available.... -
Trend-stationary GNP: evidence from a new exact pointwise most powerful invar...
There has been a substantial debate whether GNP has a unit root. However, statistical tests have had little success in distinguishing between unit-root and trend-reverting... -
Testing for a unit root in the volatility of asset returns (replication data)
It is now well established that the volatility of asset returns is time varying and highly persistent. One leading model that is used to represent these features of the data is... -
Detecting periodically collapsing bubbles: a Markov-switching unit root test ...
This paper addresses the problem of testing for the presence of a stochastic bubble in a time series in the case that the bubble is periodically collapsing so that the asset...
