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Re: st: AW: confidence interval of a ratio of coefficients
From
Steve Samuels <[email protected]>
To
[email protected]
Subject
Re: st: AW: confidence interval of a ratio of coefficients
Date
Fri, 9 Apr 2010 13:00:46 -0400
Martin-
I left out rep78.
On Fri, Apr 9, 2010 at 10:35 AM, Martin Weiss <[email protected]> wrote:
>
> " The bootstrap command should have been:
> bootstrap ratio = (-_b[price]/_b[weight]), rep(500): logit foreign
> price weight rep78"
>
Shehzad:
The first variable in the list will be the denominator coefficient.
Note that -wtp- estimates minus the ratio. You can programmatically
change the signs by extracting the ratio and confidence limits from
the returned matrix r(wtp).
Steve
Is this correct that Arne's -wtp- module can be used for ratio of a
set of any two coefficients, i.e. one of the coefficients doesn't
necessarily have to be associated with cost?
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