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From |
Austin Nichols <austinnichols@gmail.com> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: AW: AW: Creating a variable taking the value of elasticity |

Date |
Tue, 8 Sep 2009 10:52:27 -0400 |

Dorothy Bridges<dbstata@gmail.com>: The linear model and the log-log model make very different assumptions about the data-generating process, so you should not expect to get the same estimates from them. -mfx- after a linear model in particular will give approximate estimates that are very questionable--note that if the true model is y=Xb+e then the elasticity of y with respect to x (a variable, or column of X) will vary as x varies. On Tue, Sep 8, 2009 at 10:32 AM, Dorothy Bridges<dbstata@gmail.com> wrote: I still > don't see, then, how mfx, eyex gives me a value different than the > coefficient on lnx in regress lny lnx. Thanks again for all your > thoughts. > > > On Tue, Sep 8, 2009 at 10:20 AM, Maarten buis<maartenbuis@yahoo.co.uk> wrote: >> --- On Tue, 8/9/09, Dorothy Bridges wrote: >>> But what I don't understand is: the second method >>> (using mfx, eyex) gives me a different value than >>> the first method (storing the coefficient on x >>> from *regress lny lnx*). Why? * * 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/

**Follow-Ups**:**Re: st: AW: AW: Creating a variable taking the value of elasticity***From:*Dorothy Bridges <dbstata@gmail.com>

**References**:**Re: st: AW: AW: Creating a variable taking the value of elasticity***From:*Dorothy Bridges <dbstata@gmail.com>

**Re: st: AW: AW: Creating a variable taking the value of elasticity***From:*Maarten buis <maartenbuis@yahoo.co.uk>

**Re: st: AW: AW: Creating a variable taking the value of elasticity***From:*Dorothy Bridges <dbstata@gmail.com>

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