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From |
Jason Ferris <j.ferris@uq.edu.au> |

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

Subject |
st: RE: Calculate confidence intervals for log-log models |

Date |
Tue, 5 Mar 2013 20:26:56 +0000 |

Hi Nick, Sorry for my ambiguity. And thank you for your response. Before, I start writing my own code to do this I will attempt to clarify. Yes I transformed both Y and X with a natural log transformation ln(y) and ln(x) I then regress lny on lnx OLS example of a result: ------------------------------------------------------------------------------ lny | Coef. Std. Err. t P>|t| [95% Conf. Interval] -------------+---------------------------------------------------------------- lnx | 2.105722 .0817271 25.77 0.000 1.942802 2.268642 _cons | -3.032146 .4274653 -7.09 0.000 -3.884282 -2.180009 ------------------------------------------------------------------------------ To calculate a 10% change on lnx (with confidence intervals) when I type lincom 1.1^lnx - I get the message 'not possible with text' I would like to construct a table highlighting percentage changes in lny with a series of percentage changes (10,25...) in lnx Kind regards, Jason On Tue, 5 Mar 2013 12:49:28 +0000 Nick Cox <njcoxstata@gmail.com> wrote: Not really clear what you are doing but I guess that you are transforming first. Either way, something like _b[ln(y)] makes no sense to Stata as ln(y) can't be a variable name. I fear you need to write your own code. Nick On Tue, Mar 5, 2013 at 11:30 AM, Jason Ferris <j.ferris@uq.edu.au> wrote: > I have run a series of log-log OLS models - ln(y)=ln(x)+cons - and would like to present a table of percentage change at 10%, 25%, 50%, & 75% with corresponding changes in the confidence intervals. > > Is there a way to do this in Stata or a ado file that I could utilise. > > When trying to use lincom (.e.g., 1.1^_b[ln(x)] - I get a 'not possible with test' error. What are the alternatives besides doing it all by hand? * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/faqs/resources/statalist-faq/ * http://www.ats.ucla.edu/stat/stata/

**Follow-Ups**:**Re: st: RE: Calculate confidence intervals for log-log models***From:*Nick Cox <njcoxstata@gmail.com>

**Re: st: RE: Calculate confidence intervals for log-log models***From:*Richard Goldstein <richgold@ix.netcom.com>

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