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From |
Richard Williams <[email protected]> |

To |
[email protected] |

Subject |
Re: st: Centering variables for interactions and using mi regress |

Date |
Sat, 15 Jan 2011 18:36:12 -0500 |

At 04:12 PM 1/15/2011, Amy S wrote:

Hello everyone!Â This may be a very basicquestion for most of you, butÂ I am runningregressions using multiple imputation (miregress) in stata 11.Â Because my models haveinteractions, I need to center the continuousvariables used in those interactions.Â However,I am unsure how to do this for the variable I amimputing.Â In the past, without multipleimputation, I have just centered the variablesfirst, and then used the new centered variables(and interaction terms with those centervariables) in the regression.Â However, becausethe missing data on the variable is imputedbased on the regression model itself, I donâtthink I can do that.Â Please correct me if Iâmwrong, butÂ I doubt itâs legit to simply beginby centering the variable and then use miregress to impute with the centered form of thevariables, is it?Â Even if that is legit, howwould I create the interaction term beforeputting it into the regression if all the datahas not been imputed yet and therefore thereare missing variables?Â Maybe there is asimple way to do all of the centering andcreatingÂ interaction terms and runnign theregression model with imputation allÂ in one stepÂ - I'm hoping so!Â Â ÂÂ Thanks in advance! Â -Amy * * 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/

------------------------------------------- Richard Williams, Notre Dame Dept of Sociology OFFICE: (574)631-6668, (574)631-6463 HOME: (574)289-5227 EMAIL: [email protected] WWW: http://www.nd.edu/~rwilliam * * 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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