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Arrelano Bond
xtabond denvar indpvar
xtabond denvar indpvar , vce(robust)
The moment conditions of these GMM estimators are valid only if there is no serial correlation
in the idiosyncratic errors. Because the first difference of white noise is necessarily auto
correlated, we need only concern ourselves with second and Higher Auto correlation we can use
estat abond to test for autocorrelation
For checking the first difference autocorrelation (Command)
estat abond, artests(4)
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