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From |
Nick Cox <n.j.cox@durham.ac.uk> |

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

Subject |
RE: st: RE: non-constant Frequency weights |

Date |
Tue, 26 Oct 2010 19:28:05 +0100 |

Fair enough. Now you have a specific question, to which I don't know the answer; but someone else may have specific advice. Nick n.j.cox@durham.ac.uk Stephen O Neill When I try to run - xtreg,fe - I get the error message "weight must be constant within ID", where ID is my unique identifier for each individual and is constant for an individual over time. I also wanteed to use the user written - xtabond2 - or some other dynamic model but it appears that weights can't be used with these. Nick Cox <n.j.cox@durham.ac.uk> I don't see the connections between these statements. A variable containing frequency weights can vary between observations, in this instance within panels as well as between panels, so that is not a problem in itself. Perhaps some particular procedures have more restricted assumptions, but you don't say what they are. Stephen O Neill I am using unbalanced panel data which contains a frequency weight each year. However the weight is not constant through time with the result that I cannot weight the data using - [fweight = weight] - . I was just wondering if there is a simple work around? * * 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: RE: non-constant Frequency weights***From:*Steven Samuels <sjsamuels@gmail.com>

**References**:**st: non-constant Frequency weights***From:*Stephen O Neill <stepheno_neill_1999@yahoo.com>

**st: RE: non-constant Frequency weights***From:*Nick Cox <n.j.cox@durham.ac.uk>

**Re: st: RE: non-constant Frequency weights***From:*Stephen O Neill <stepheno_neill_1999@yahoo.com>

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