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st: Most models have absurd implications (was: Re: st: MIXLOGIT: marginal effects)
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st: Most models have absurd implications (was: Re: st: MIXLOGIT: marginal effects)
Date
Tue, 7 Feb 2012 10:48:11 +0100
Nick wrote:
" In the auto data I just regressed gallons per mile [NB] on weight and I
get a positive intercept, which is quite unphysical".
Nick's example reminds me of another one of a similar flavor:
Douglas G Altman and J Martin Bland. Statistics Notes: Generalisation and
extrapolation. British Medical Journal 1998;317:409-410,
http://bmj.com/cgi/content/full/317/7155/409, especially page 410, left
column, lines 9-13 from below.
Kindest Regards,
Carlo
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