GPHROB: RATS modules to perform tests for fractional integration of timeseries
Christopher F Baum
John T. Barkoulas
These procedures, written for RATS version 4.2/4.3, calculate the GPH (Geweke & Porter-Hudak, 1983 J. Time Series Analysis) spectral regression estimator, the Robinson Gaussian semiparametric estimator (1995 Annals of Statistics) and the Robinson average periodogram long memory estimator (1994 Annals of Statistics) for fractional order of integration of a timeseries. Procedure GPH.SRC performs the test for a single series, for a given power value, and prints the result. Procedure GPHFN.SRC performs the test on differenced data and returns its results. This is useful if you are calculating GPH tests for a range of series and power values; you may then tabulate the results in a matrix. Procedure RGSER.SRC, originally written by Rob Schoen, has been corrected from the version posted on Estima's website. It implements Robinson's Gaussian semiparametric estimator. Program RAVPER.SRC, written by John Barkoulas, implements Robinson's average periodogram long memory estimator.
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