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Re: st: xtmixed and missing data

From   "Mary E. Mackesy-Amiti" <>
Subject   Re: st: xtmixed and missing data
Date   Fri, 29 Apr 2011 12:01:31 -0500

if you get no answer that may indicate that your question is not understandable. Try supplying more information, like the syntax you are using to estimate your model.

On 4/28/2011 2:19 PM, Dennis Kramer wrote:
I am estimating an xtmixed function while controlling previous year
experience/achievement. How I am using three previous year testing
data to predict the current year's performance. However, I do not want
to exclude individuals in my sample who do not have a score in each of
three years. Currently, when I am estimating the predicted value, it
is dropping all those who do not have a value in each variable.

Is there is a command I could use to allow data to be estimated on the
number of data points an individual has? Overview of my data is as

Subject # --- Year X Test --- Year X-1 Test ---- Year X-2 Test ---
Year X-3 Test ---- Covariates

Thank you
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Mary Ellen Mackesy-Amiti, Ph.D.
Research Assistant Professor
Community Outreach Intervention Projects (COIP)
School of Public Health m/c 923
Division of Epidemiology and Biostatistics
University of Illinois at Chicago
ph. 312-355-4892
fax: 312-996-1450

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