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From |
"Nick Cox" <n.j.cox@durham.ac.uk> |

To |
<statalist@hsphsun2.harvard.edu> |

Subject |
st: RE: Re: Re: Re: Fracpoly |

Date |
Tue, 12 Feb 2008 00:41:27 -0000 |

-ereturn list- shows what -fracpoly- leaves in memory. In principle, you could work on that information. In practice, you would need to work up some Stata skills to get there. Doing this in complete generality might be quite an undertaking. I have some broad concern with what you are doing. -fracpoly- fits a model to the whole dataset. It often works nicely because it uses quite a flexible family of possible fits. Nevertheless you want to extract properties that depend on first and second derivatives. That seems to me to invest a great deal of trust in the models, which are not necessarily optimal for that purpose. However, I don't have a good alternative solution, but I would recommend some comparison with quite different ways of doing it, e.g. based on numerical differentiation of other kinds of smooth fit. Nick n.j.cox@durham.ac.uk mai mai I guess I am wondering is there a way to enter the resulting functional form that is predicted by Fracpoly into STATA automatically. Unfortunatly, I am not technically savvy with STATA to figure out a way to do that. * * For searches and help try: * http://www.stata.com/support/faqs/res/findit.html * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/

**Follow-Ups**:**Re: st: RE: Re: Re: Re: Fracpoly***From:*Maarten buis <maartenbuis@yahoo.co.uk>

**References**:**st: Re: Re: Re: Fracpoly***From:*"mai mai" <mai7777@gmail.com>

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