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From |
Joerg Luedicke <[email protected]> |

To |
[email protected] |

Subject |
Re: st: factor variables and pweights not accepted in qreg Stata v13 |

Date |
Wed, 26 Jun 2013 11:26:57 -0400 |

I cannot replicate the problem: . sysuse auto (1978 Automobile Data) . qreg price weight length i.foreign Iteration 1: WLS sum of weighted deviations = 112795.66 Iteration 1: sum of abs. weighted deviations = 111901 Iteration 2: sum of abs. weighted deviations = 110529.43 Iteration 3: sum of abs. weighted deviations = 109524.57 Iteration 4: sum of abs. weighted deviations = 109468.3 Iteration 5: sum of abs. weighted deviations = 109105.27 note: alternate solutions exist Iteration 6: sum of abs. weighted deviations = 108931.02 Iteration 7: sum of abs. weighted deviations = 108887.4 Iteration 8: sum of abs. weighted deviations = 108822.59 Median regression Number of obs = 74 Raw sum of deviations 142205 (about 4934) Min sum of deviations 108822.6 Pseudo R2 = 0.2347 ------------------------------------------------------------------------------ price | Coef. Std. Err. t P>|t| [95% Conf. Interval] -------------+---------------------------------------------------------------- weight | 3.933588 1.328718 2.96 0.004 1.283543 6.583632 length | -41.25191 45.46469 -0.91 0.367 -131.9284 49.42456 | foreign | Foreign | 3377.771 885.4198 3.81 0.000 1611.857 5143.685 _cons | 344.6489 5182.394 0.07 0.947 -9991.31 10680.61 ------------------------------------------------------------------------------ . qreg price weight length foreign [pw= displacement] Iteration 1: WLS sum of weighted deviations = 23571568 Iteration 1: sum of abs. weighted deviations = 23596808 Iteration 2: sum of abs. weighted deviations = 23268657 Iteration 3: sum of abs. weighted deviations = 23264763 Iteration 4: sum of abs. weighted deviations = 23242098 Iteration 5: sum of abs. weighted deviations = 23240219 Iteration 6: sum of abs. weighted deviations = 23239934 Median regression Number of obs = 74 Raw sum of deviations 3.54e+07 (about 5379) Min sum of deviations 2.32e+07 Pseudo R2 = 0.3438 ------------------------------------------------------------------------------ | Robust price | Coef. Std. Err. t P>|t| [95% Conf. Interval] -------------+---------------------------------------------------------------- weight | 6.274595 .2034548 30.84 0.000 5.868817 6.680372 length | -99.88108 7.523739 -13.28 0.000 -114.8867 -84.87546 foreign | 3937.741 68.35094 57.61 0.000 3801.419 4074.062 _cons | 4400.254 875.7561 5.02 0.000 2653.614 6146.895 ------------------------------------------------------------------------------ In the -qreg- help file it says: "qreg allows fweights, aweights, iweights, and pweights;" Not sure how this kind of stuff maps to dialog boxes as I never use them. Joerg On Tue, Jun 25, 2013 at 5:16 PM, Ariel Linden, DrPH <[email protected]> wrote: > I just got version 13 today and immediately fired it up... > > Contrary to the help file for -qreg- that says "indepvars may contain factor > variables; see fvvarlist" and "qreg allows fweights, aweights, iweights, and > pweights; see weight", I got an error when running the following code: > > . sysuse auto > > . qreg price weight length i.foreign > factor variables and time-series operators not allowed > r(101); > > . qreg price weight length foreign [pw= displacement] > pweight not allowed > r(101); > > n.b. I just noticed that in the dialog box for qreg, there is no pweight > option... > > Ariel > > * > * 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/ * * 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/

**References**:**st: factor variables and pweights not accepted in qreg Stata v13***From:*"Ariel Linden, DrPH" <[email protected]>

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