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Long-Run PPP May Not Hold After All.
Engel, C., (1996)
Semiparametric Efficient Estimation in Time Series.
Hodgson, D.J., (1997)
Multivariate Tests of Fractionally Integrated Hypotheses.
Gil-Alana, L., (1998)
Nelson and Plosser Revisited: Evidence from Fractional Arima Models.
Testing of Seasonal Fractional Integration in U.K. and Japanese Consumption and Income.