--- GUO Lei <[email protected]> wrote:
> Seems though mfp is not what i'm looking for. Because I do not want
> to impose any specification on some key factor, but mfp seems still
> has restrion on the regression form
No, a fractional polynomial, is not the same as polynomial regression.
a) fractional polynomials are much more flexible functions, and b) we
don't a priori specify which powers to estimate, but -mfp- finds those
powers for us. So, I would happily call -mfp- non-parametric.
-----------------------------------------
Maarten L. Buis
Department of Social Research Methodology
Vrije Universiteit Amsterdam
Boelelaan 1081
1081 HV Amsterdam
The Netherlands
visiting address:
Buitenveldertselaan 3 (Metropolitan), room Z434
+31 20 5986715
http://home.fsw.vu.nl/m.buis/
-----------------------------------------
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