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How close is a fractional process to a random walk with drift?
Larsson, Rolf, (2015)
Forecasting electricity price in Colombia : a comparison between neural network, ARMA process and hybrid models
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Tests of common stochastic trends
Nyblom, Jukka, (1999)
Testing against smooth stochastic trends
Nyblom, Jukka, (2001)
The econometric analysis of time series
Harvey, Andrew C., (1986)