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From |
Klaus Nowotny <klaus.nowotny@sbg.ac.at> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: suest after svy:clogit |

Date |
Fri, 17 May 2013 17:32:16 +0200 |

Dear Maarten,

svyset id [pw=weight]

In any case, thanks a lot! Klaus Am 17.05.2013 13:14, schrieb Maarten Buis:

On Thu, May 16, 2013 at 6:31 PM, Klaus Nowotny wrote:I am having troubles using suest to test the equality of coefficients across two groups after svy:clogit. My survey data is set up as follows: svyset id [iw=weight]To quote -help weight-: "iweights, or importance weights, are weights that indicate the "importance" of the observation in some vague sense. iweights have no formal statistical definition; any command that supports iweights will define exactly how they are treated. Usually, they are intended for use by programmers who want to produce a certain computation." So using iweights for a statistical analysis is almost certainly a mistake.I then estimate the model for two subgroups: svy, subpop(if group==1): clogit choice x1 x2, group(id) est sto group1 svy, subpop(if group==2): clogit choice x1 x2, group(id) est sto group2 To test for the equality of the coefficients of x1 across the two groups I follow the Stata reference manual for suest and enter suest group1 group2 but Stata returns "r(198); option cluster() is not allowed with svy results" although I never entered the cluster option anywhere.Why not just estimate the entire model in one go? svy : clogit choice i.group##(c.x1 c.x2), group(id) Hope this helps, Maarten The same occurs if Itry the alternative procedure suggested in the reference manual: clogit choice x1 x2 if group==1 [iw=weight], group(id) est sto group1 clogit choice x1 x2 if group==2 [iw=weight], group(id) suest group1 group2, svy Why do I keep getting this error message? Any help would be greatly appreciated! Thanks, Klaus -- Klaus Nowotny University of Salzburg * * 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/-- --------------------------------- Maarten L. Buis WZB Reichpietschufer 50 10785 Berlin Germany http://www.maartenbuis.nl --------------------------------- * * 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/

**Follow-Ups**:**Re: st: suest after svy:clogit***From:*William Buchanan <william@williambuchanan.net>

**References**:**st: suest after svy:clogit***From:*Klaus Nowotny <klaus.nowotny@sbg.ac.at>

**Re: st: suest after svy:clogit***From:*Maarten Buis <maartenlbuis@gmail.com>

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