A Stata Plugin for Estimating Group-Based Trajectory ...
Mar 29, 2013 · Effects of time dependent covariate s on the trajectory itself are modeled by generalizing the specification of the polynomial function of age or time that defines the shape of the trajectory in the basic model without other covariates to include such covariate wh ether time -varying (e.g., grade point average) or not (e.g., cohort membership).
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Introduction to Regression Models for Panel Data Analysis ...
ssrc.indiana.eduOct 07, 2011 · WIM Panel Data Analysis October 2011| Page 4 An alternative way to structure the data is to keep all the measures related to each student in a single record. This is sometimes called “wide” format. StudentID Female HSGPA GPA5 JobHrs5 GPA6 JobHrs6 17 0 2.8 3.0 0 2.1 20 23 1 2.5 2.2 10 2.5 10
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