Panel Data Linear Models Panel unit root tests - Model in first differences Empirical example - Serial correlation and heteroskedasticity tests for the model in first difference
Serial correlation test for the model in first difference . xtserial dlconsumo dlpib dlirate Wooldridge test for autocorrelation in panel data H0: no first-order autocorrelation F( 1, 121) = 0.333 Prob > F = 0.5647
Heteroskedasticity test for the model in first difference . lrtest hetero homosk , df(`df´) Likelihood-ratio test (Assumption: homosk nested in hetero)
Gustavo Sanchez (StataCorp)
LR chi2(121)= Prob > chi2 =
June 22-23, 2012
2582.04 0.0000
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