I made for my data a "hettest" and a "whitetst" to control for
heteroskedasticity. While the hettest affirm heteroskedasticity (Prob >
chi2 = 0.0185) the whitetst assigns a p-Value of .6381. What does
this mean? Is my sample heteroskedastic or homoskedastic? What's the
null hypothesis of whitetst? If the null hypothesis is homoskedasticity
there is a contradiction in the two test results, isn't it? What's the
explanation for this?
Thank you for your help!
Andreas
