OrdinalTVEM.sas and OrdinalTVEMLoop.sas
Supporting code for the paper
Dziak, J. J., Li, R., Zimmerman, M. A., & Buu, A. (2014). Time-varying effect models for ordinal responses with applications in substance abuse research. Statistics in Medicine, 33: 5126-5137.
available online at https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4227951/