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From |
"Martin Weiss" <martin.weiss1@gmx.de> |

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

Subject |
st: AW: questions |

Date |
Mon, 2 Nov 2009 13:55:36 +0100 |

<> You can take a look at its calculations via (careful: clutter hazard!) ************* sysuse auto, clear reg pr we le tu tr set tr on nlcom (ratio1: _b[length]/_b[_cons]) set tr off ************* but I would rather look at http://www.stata.com/support/faqs/stat/deltam.html BTW, if you use Stata 11, you should have the manuals, at least in pdf format, and page 1209 of [R] shows you all the necessary formulae... HTH Martin -----Ursprüngliche Nachricht----- Von: owner-statalist@hsphsun2.harvard.edu [mailto:owner-statalist@hsphsun2.harvard.edu] Im Auftrag von Tunga Kantarci Gesendet: Montag, 2. November 2009 12:05 An: statalist@hsphsun2.harvard.edu Betreff: st: questions Hello, I would like to ask two unrelated questions. 1. The regression output presents ANOVA analysis. Take for example, the MS column for the residuals, which is the mean of the sum of squared residuals. I would like to calculate a quantity using the "nlcom" command and in this command I would like to indicate the estimated MS residual. What is the command for calling the MS residual in, for example the nlcom command? Put more simply, we call for example a coefficient estimate of a variable with "_b[variablename]". What I am asking is how do I call a figure from the ANOVA table? For example the MS of residuals? I could just use the estimated figure for MS residuals but this is not what I want. 2. Suppose that I wish to calculate the standard error of _b[_cons]/_b[variablename]. Stata help system indicates that Stata uses the "delta" method to calculate this standard error. But I wish to see what Stata exactly calculates. How do I see it? Or do I need the Stata manual books for this? Stata help system does not indicate any formula it uses. Thank you 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: questions***From:*Tunga Kantarci <tungakantarci@hotmail.com>

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