English, Article edition: DFGLS: Stata module to compute Dickey-Fuller/GLS unit root test Christopher F Baum; Richard Sperling

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Physical Description
  • code
Language
  • English

Edition details

Title
  • DFGLS: Stata module to compute Dickey-Fuller/​GLS unit root test
Author
  • Christopher F Baum
  • Richard Sperling
Physical Description
  • code
Notes
  • dfgls performs the Elliott-Rothenberg-Stock (ERS, 1996) efficient test for an autoregressive unit root. This test is similar to an (augmented) Dickey-Fuller "t" test, as performed by dfuller, but has the best overall performance in terms of small-sample size and power, dominating the ordinary Dickey-Fuller test. The code has been revised to calculate the optimal lag length using a sequential t-test (Ng and Perron, 1995), the SC and the AIC. This is version 1.3.10 of the software, updated from that published in STB-58. This version uses doubles throughout, improved critical values from response surface estimation, corrects an error in the calculation of the Schwarz criterion, corrects an error in the use of initial missing observations, and adds the MAIC criterion (Ng and Perron 2001), which is much more appropriate than SC or AIC in the presence of negative moving average components. It also adds an option to save the residuals from detrending (demeaning). dfgls is now a part of official Stata version 8, and routine dfgls2 (for Stata 8; q.v.) adds the capability to estimate the test on a single unit of a panel.
  • timeseries, unit root, Dickey-Fuller
  • RePEc:boc:bocode:s410001
Language
  • English
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