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The KPSS stationarity test as a unit root test
Shin, Yongcheol, (1992)
Testing the null hypothesis of stationarity against the alternative of a unit root : How sure are we that economic time series have a unit root?
Kwiatkowski, Denis, (1992)
A residual-based test of the null of cointegration against the alternative of no cointegration
Shin, Yongcheol, (1994)