My question is about the verify of the OLS residuals indipendnce assumption.
In the web book in UCLA web site I heve read that is possible use the DW
test also for the cross-sectional regression (but I have study that the
DW is only for the time series) or apply a grafic method but it seems to
me not very clear, and so I asked for any help.
Many many thanks.
*
*   For searches and help try:
*   http://www.stata.com/support/faqs/res/findit.html
*   http://www.stata.com/support/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/