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Re: st:ttest-ignore


From   "Vidya Mahambare" <[email protected]>
To   <[email protected]>
Subject   Re: st:ttest-ignore
Date   Thu, 04 Dec 2003 12:00:01 +0000

Please ignore the ttest question. Managed to solve.

thanks
vidya


>>> [email protected] 12/04/03 11:25am >>>
Hi All,
I am having some problem using ttest. I have a panel data - 10 time periods,
2000+ firms from 13 sectors and 3 ownership categories.
I am interested in testing whether the means of a variable (efficiency
indicator) are different for the ownership pairs during a particular time
period
for each sector.
Eg; time = 1 to 4, ttest efficiency if owner =1 and owner =3 for sector 1,
then
sector 2 and so on
Time = 5 to 8, ttest efficiency if owner =1 and owner =3 for sector 1, then
sector 2 and so on

Should I temporality drop observations in all sectors except one and then do
ttest? I have tried several different ways, but without success. 

Any suggestion would be helpful.

thanks

Vidya



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