Mplus Users Guide v6.. - Muthén & Muthén

TITLE, DATA, VARIABLE, And DEFINE CommandsThe BWTSCALE option has the following settings: UNSCALED andSAMPLE. SAMPLE is the default.The UNSCALED setting uses the between weights from the data setwith no adjustment. The SAMPLE option adjusts the between weightsso that the product of the between and the within weights sums to thetotal sample size.The BWTSCALE option is specified as follows:BWTSCALE = UNSCALED;where no adjustment is made to the between weights.REPWEIGHTSReplicate weights summarize information about a complex samplingdesign (Korn & Graubard, 1999; Lohr, 1999). They are used to properlyestimate standard errors of parameter estimates. Replicate weights areavailable for TYPE=COMPLEX for continuous variables usingmaximum likelihood estimation and for binary, ordered categorical, andcensored variables using weighted least squares estimation. Replicateweights can be used or generated. When they are generated, they can beused in the analysis and/or saved (Asparouhov & Muthén, 2009b).The REPWEIGHTS option is used to identify the replicate weightvariables. The STRATIFICATION and CLUSTER options may not beused in conjunction with the REPWEIGHTS option. The WEIGHToption must be used. Following is an example of how to specify theREPWEIGHTS option:REPWEIGHTS = rweight1-rweight80;where rweight1 through rweight80 are replicate weight variables.USING REPLICATE WEIGHTSWhen existing replicate weights are used, the REPWEIGHTS option ofthe VARIABLE command is used in conjunction with the WEIGHToption of the VARIABLE command and the REPSE option of the503