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st: RE: Calculate confidence intervals for log-log models
From
Jason Ferris <[email protected]>
To
"[email protected]" <[email protected]>
Subject
st: RE: Calculate confidence intervals for log-log models
Date
Tue, 5 Mar 2013 20:58:57 +0000
Hi Nick and Rich,
Nick - I was going to run a series of 'changes' in the original variable (as you suggested) by dividing the original variable by a series of constants (representing the percentage value changes) that I want. I thought I could get this directly by using lincom - but didn't appreciate it was only about 'linear combinations'.
Rich - thank you for suggestion - this gives me exactly what I am looking for.
------------------------------------------------------------------------------
lny | Coef. Std. Err. t P>|t| [95% Conf. Interval]
-------------+----------------------------------------------------------------
lnx | 2.105722 .0817271 25.77 0.000 1.942802 2.268642
_cons | -3.032146 .4274653 -7.09 0.000 -3.884282 -2.180009
------------------------------------------------------------------------------
. nlcom 1.1^_b[lnx]
_nl_1: 1.1^_b[lnx]
------------------------------------------------------------------------------
lny | Coef. Std. Err. t P>|t| [95% Conf. Interval]
-------------+----------------------------------------------------------------
_nl_1 | 1.222254 .0095207 128.38 0.000 1.203275 1.241233
------------------------------------------------------------------------------
Cheers,
Jason
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