The durbinh (Durbin's H test) and bgtest (Breusch-Godfrey LM test) routines
for the analysis of serial correlation in regression residuals have been
updated from the versions published in STB-55. An option, force, has been
added that permits these routines' use after regress, robust or newey. The
routines are available for Stata 6 and 7, and may be accessed via the ssc
command (or archutil, in Stata 6).