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


From   Nick Cox <njcoxstata@gmail.com>
To   "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu>
Subject   Re: st: Regressions with dependent continuous variable with bounded range
Date   Sat, 17 Dec 2011 19:30:35 +0000

In this case

twoway qfit mpg weight

is an alternative.

Nick

On 17 Dec 2011, at 19:17, brendan.halpin@ul.ie (Brendan Halpin) wrote:

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)


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