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Re: st: Regressions with dependent continuous variable with bounded range


From   [email protected] (Brendan Halpin)
To   [email protected]
Subject   Re: st: Regressions with dependent continuous variable with bounded range
Date   Sat, 17 Dec 2011 19:17:33 +0000

On Sat, Dec 17 2011, Suryadipta Roy wrote:

> I would very much appreciate some help as to how to interpret the sign
> of the coefficient associated with the squared term of an explanatory
> variable in such a model. 

The best way of interpreting it is graphically. For example:

sysuse auto
reg mpg c.weight##c.weight
twoway function x*_b[weight] + x^2*_b[c.weight#c.weight], range(weight)

Brendan

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Brendan Halpin,   Department of Sociology,   University of Limerick,   Ireland
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