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From |
Maarten buis <maartenbuis@yahoo.co.uk> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: question |

Date |
Tue, 3 Nov 2009 23:51:05 +0000 (GMT) |

Having re-read your question I am guessing that you are dealing with the following problem: You estimated a linear regression on an explained variable that has been log-transformed and you are trying to get predictions and standard errors in the original non-transformed metric. If that is the case than there is a much simpler and much more elegant solution to that problem. The problem is that -------------------------- Maarten L. Buis Institut fuer Soziologie Universitaet Tuebingen Wilhelmstrasse 36 72074 Tuebingen Germany http://www.maartenbuis.nl -------------------------- --- On Tue, 3/11/09, Tunga Kantarci <tungakantarci@hotmail.com> wrote: > From: Tunga Kantarci <tungakantarci@hotmail.com> > Subject: st: question > To: statalist@hsphsun2.harvard.edu > Date: Tuesday, 3 November, 2009, 1:38 PM > Hello, > > I wish to calculate a figure where I call coefficient > estimates and > residuals sum of squares and degrees of freedom. All these > quantities are > from the stata estimation output. When I run the relevant > command "nlcom > exp(_b[_cons]+_b[income]*15.3)*exp(e(rss)/e(df_r)/2)" I get > the error "could > not calculate numerical derivative". This is perhaps > because e(rss) and > e(df_r) are not estimates. (As Maarten pointed out > yesterday actually) > > 1. Does this mean that in the nlcom command I am only > allowed to specify > coefficient estimates? > 2. How can I achieve what I want to achieve: I wish to call > figures into the > stated command I am running. > > Thanks in advance. > > > * > * For searches and help try: > * http://www.stata.com/help.cgi?search > * http://www.stata.com/support/statalist/faq > * http://www.ats.ucla.edu/stat/stata/ > * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/

**References**:**st: question***From:*Tunga Kantarci <tungakantarci@hotmail.com>

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