I am running some simulations including a regress command and have come across some curiosities with scalars.
I run the following commands:
regress beta alpha [aweight=prec], nocons vce(cluster trial)
scalar var_alpha = _se[alpha]
scalar est_alpha = _coef[alpha]
scalar r_sqrd = e(r2)
When I type scalar list, I get the following:
. scalar list
r_sqrd = .09759686
est_alpha = .42516408
var_alpha = .48875057
But, when I try to display the contents of scalar var_alpha, it appears to only contain '.':
. disp var_alpha
.
Any thoughts on why this is? It's driving me mad!
Many thanks for your help,
Patrick
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Patrick Phillips
Statistician
MRC Clinical Trials Unit
222 Euston Road
London NW1 2DA
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