Stata 11 help for vif help ovtest, help hettest, help szroeter, help vif, help imtest, help dwstat, help durbina, bgodfrey, help archlm ------------------------------------------------------------------------------- These commands continue to work but are out-of-date as of Stata 9. Their replacements are Old command New command ------------------------------ hettest estat hettest imtest estat imtest ovtest estat ovtest szroeter estat szroeter vif estat vif ------------------------------ See regress postestimation. Old command New command ------------------------------ archlm estat archlm bgodfrey estat bgodfrey durbina estat durbinalt dwstat estat dwatson ------------------------------ See regress postestimation ts.