st: How to check for autocorrelation in panel model with instruments?

[Joel Virgen Rojano <jvr101@york.ac.uk>]

How can I check for autocorrelation and heteroskedasticity if I have 
estimated a panel data with instruments using the command "ivreg"? I've 
tried "hettest" and "whitetst" for Heteroskedasticity and "xtserial" for 
autocorrelation but it seems that either these commands do not apply to the 
case or I'm not using them properly.

Thanks in advance for your help.

--
Joel Virgen Rojano
PhD student
The Department of Economics
The University of York
Heslington, York
YO10 5DD
United Kingdom
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