How to fix heteroskedasticity and autocorrelation on OLS

[Nguyen Linh]

Hi
I did OLS test for my panel data ( n= 760 and t=8) and checked heteroskedasticity and autocorrelation as below ( the result show that there is heteroskedasticity and autocorrelation

White's test for Ho: homoskedasticity
         against Ha: unrestricted heteroskedasticity

         chi2(25)     =    268.88
         Prob > chi2  =    0.0000

Cameron & Trivedi's decomposition of IM-test

---------------------------------------------------
              Source |       chi2     df      p
---------------------+-----------------------------
  Heteroskedasticity |     268.88     25    0.0000
            Skewness |      40.02      6    0.0000
            Kurtosis |       1.57      1    0.2105
---------------------+-----------------------------
               Total |     310.46     32    0.0000

. xtserial lexport lgdp lpgdp llpitotal ldistance dummyrta dummyland

Wooldridge test for autocorrelation in panel data
H0: no first-order autocorrelation
    F(  1,      94) =    110.533
           Prob > F =      0.0000

How can I fix this . is this ok to add vce cluster ( country1) into ols test to fix
Thank you

[Joro Kolev]

Yes, clustering by the panel variable resolves heteroskedasticity and auto correlation issues.

[Nguyen Linh]

Thanks so much