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A Note on a Stata Plugin for Estimating Group-based Trajectory Models

2013; SAGE Publishing; Volume: 42; Issue: 4 Linguagem: Inglês

10.1177/0049124113503141

1552-8294

Bobby L. Jones, Daniel S. Nagin,

Insurance, Mortality, Demography, Risk Management

Group-based trajectory models are used to investigate population differences in the developmental courses of behaviors or outcomes. This note introduces a new Stata command, traj, for fitting to longitudinal data finite (discrete) mixture models designed to identify clusters of individuals following similar progressions of some behavior or outcome over age or time. Normal, Censored normal, Poisson, Zero-inflated Poisson, and Logistic distributions are supported.