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From |
"rafaelcla" <[email protected]> |

To |
"statalist" <[email protected]> |

Subject |
Re:st: How to weight datasets? |

Date |
Sat, 30 Aug 2008 21:46:37 -0300 |

Hagen, In order to obtain weighted estimations � and consequently fit your data on a specific population � you�ll need to �place the weight� on estimation command NOT on the data. �To Weight� the data (like, by replicate a single case X times according to its weight) does not work in many, many situations�and will possibly drive you to wrong results�so, don�t do this unless you are totally sure about it. As I�m not exactly sure about the sample design (and the kind of weight) you have�I�ll give you an example as if you were using �probability weights�. After loading your dataset, to obtain a weighted mean of variable �X�, using the weight variable �Y� (that should indicate the probability weight or just PW), all you need to do is type: mean X [pw=Y] In fact, as you can note, the �weighting procedure� (described by the extension �[pw=Y]� on the command above) works as an extension of the command�not a command itself (if you type just "mean X"stata will give you the unweighted mean). Not all kinds of weight (PW, AW, IW�) work with all commands�but you can figure this out on the help file of the commands you want to proceed with. Best, Rafael Claro ---------- In�cio da mensagem original ----------- De: [email protected] Para: [email protected] Cc: Data: Sat, 30 Aug 2008 15:24:35 +0200 Assunto: st: How to weight datasets? > I have four separate datasets that I would like to weight in order to fit them on a specific population. I know that Stata has commands like pweight or aweight, but how exactly do I use them to create a weighted dataset? > Maybe someone has a do-file to show me or simply write me the needed commands. The Stata- help is no good for me, since I`m not able to use it correctly. > > HELP > > Thanks a lot > > > -- > GMX startet ShortView.de. Hier findest Du Leute mit Deinen Interessen! > Jetzt dabei sein: http://www.shortview.de/wasistshortview.php?mc=sv_ext_mf@gmx > > * > * 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/

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