[R-sig-ME] Simulating multilevel dataset

[Thompson,Paul]

Well, that's how it would be analyzed. But you have means and variability measures to generate the data. Do you have any notion of the dependencies/conditionalities inherent in the data? Are conditionalities additive? Are you considering some variance effects?

Prior to modeling conditionality, you need parameters to model in the direction of.

-----Original Message-----
From: Stuart Luppescu [mailto:slu at ccsr.uchicago.edu] 
Sent: Friday, July 05, 2013 12:19 PM
To: Thompson,Paul
Cc: r-sig-mixed-models
Subject: RE: [R-sig-ME] Simulating multilevel dataset

On Fri, 2013-07-05 at 16:53 +0000, Thompson,Paul wrote:
> You indicate that you have teacher level data and the school level data. You do not mention data about conditionality. How can you model it if you do not have some relationship to model? In addition, you do not specify the manner in which error is incorporated into the model.

The model would look something like this (in lmer notation): meas ~ var1.indic + var2.indic + (var1.indic|school) + (var2.indic|school) Does this address your questions?

> -----Original Message-----
> From: r-sig-mixed-models-bounces at r-project.org 
> [mailto:r-sig-mixed-models-bounces at r-project.org] On Behalf Of Stuart 
> Luppescu
> Sent: Friday, July 05, 2013 11:04 AM
> To: r-sig-mixed-models
> Subject: [R-sig-ME] Simulating multilevel dataset
> 
> Hello, I'm trying to simulate a multilevel dataset representing teachers within schools. To generate the data I'm using parameters from actual data. I have the means, variances and covariances of teachers on two variables; and the means, variances and covariances of the school-level means for those two variables. I can generate the teacher-level data, and the school-level data using rmvnorm() with no problem, but what I can't figure out is how to generate teacher-level data conditional on the school-level generated data. 
> 
> Can anyone give me a clue?
> 
> TIA. 
> --
> Stuart Luppescu <slu at ccsr.uchicago.edu> University of Chicago
> 
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--
Stuart Luppescu <slu at ccsr.uchicago.edu>
University of Chicago


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