Here is a formula to compute Z, which can then be
referred to a normal distribution.
Z = ( b1 � b2 ) / ( SEb1^2 + SEb2^2 ) ^ 1/2
From:
Paternoster, R., Brame, R. Mazerolle, P. and Piquero,
A. (1998). Using the correct statistical test for the
equality of regression coefficients. Criminology, 36,
859-66.
--- [EMAIL PROTECTED] wrote:
> Hello,
>
> Given the data of two sectors, I estimated a
> non-linear model and I got the
> coefficients of both sectors. Let say that the
> coefficient of the model in
> the first sector is a1 and b1 and second sector a2
> and b2. Is there any way to
> test the difference between b1 and b2 or to test
> whether b1-b2=0 or not. Your
> help is highly appreciated.
>
> Regards
> Msherif
>
>
>
>
>
>
.
.
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