### To install the Stata version:

net from http://www.andrew.cmu.edu/user/bjones/traj net install traj, force help traj References:A SAS procedure based on mixture models for estimating developmental trajectories.

Advances in group-based trajectory modeling and a SAS procedure for estimating them.

A note on a Stata plugin for estimating group-based trajectory models.

Group-based multi-trajectory modeling.

Group-based Trajectory Modeling Extended to Account for Nonrandom Participant Attrition.