Dear Statalisters,
I'm trying to fit following model using xtivreg2. (I'm using an unbalanced
panel data set.)
xtivreg2 gwgdpvdpc ln_openquota_oecd ln_govbaladj_oecd ln_unemployment
ln_lgovinvquota outputgap l.totalpop rintratelt syr termstrade fdiin
t1100gdp t1200gdp t2000gdp t3000gdp t5000gdp if year >=1990, fd
cluster(coid)
Doing this, stata gives me the warning:
Warning: estimated covariance matrix of moment conditions not of full rank.
standard errors and model tests should be interpreted with caution.
Possible causes:
number of clusters insufficient to calculate robust covariance
matrix
singleton dummy variable (dummy with one 1 and N-1 0s or vice
versa)
partial option may address problem.
My question is, how should I use the partial-option? I've got a real problem
with understanding the syntax correctly. I always get the same error
message, e.g. when I try:
. xtivreg2 gwgdpvdpc ln_openquota_oecd ln_govbaladj_oecd ln_unemployment
ln_lgovinvquota outputgap l.totalpop rintratelt
> syr termstrade fdiin t1100gdp t1200gdp t2000gdp t3000gdp t5000gdp
if year >=1990, fd cluster(coid) partial(ln_openqu
> ota_oecd ln_govbaladj_oecd ln_unemployment ln_lgovinvquota outputgap)
Error: ln_openquota_oecd ln_govbaladj_oecd ln_unemployment ln_lgovinvquota
outputgap listed in partial() but not in list of r
> egressors.
invalid syntax
Could anybody please give me a hint what I am doing wrong?
Any comments would be greatly appreciated.
Regards
Jessica
----------------------------------------------------------------
Dipl. oec. Jessica �lschl�ger
Forschungsstelle Europ�ische Integration
Universit�t Hohenheim
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