I helped develop these Methodology Center software resources, which are free to download and use.

• Dziak, J. J., Coffman, D. L., Litson, K., Chakraborti, Y., & Li, R. (2021). funmediation: Functional Mediation for a Distal Outcome (version 1.0.1). R package. Download
• Dziak, J. J., Coffman, D. L., Litson, K., Chakraborti, Y., & Li, R. (2023). tvem: Time-Varying Effect Models (version 1.4.1). R package. Download
• Li, R., Huang, L., & Dziak, J. J. (2018). VariableScreening: High-Dimensional Screening for Semiparametric Longitudinal Regression (version 0.2.0) R package. Download
• Li, R., Dziak, J. J., Tan, X., Huang, L., Wagner, A. T., & Yang, J. (2017). TVEM (time-varying effect model) SAS macro users' guide (Version 3.1.1). University Park: The Methodology Center, Penn State. Download
• Dziak, J. J., Bray, B. C., & Wagner, A. T. (2017). LCA_Distal_BCH SAS macro users' guide (Version 1.1). University Park: The Methodology Center, Penn State. Download
• Dziak, J. J., Li, R., & Wagner, A. T. (2017). WeightedTVEM SAS Macro Users' Guide (Version 2.6). University Park: The Methodology Center, Penn State. Download
• Dziak, J. J., & Shiyko, M. P. (2016). funreg (Functional Regression for Irregularly Timed Data) (Version 1.2) R package. Download
• Dziak, J. J., Yang, J., Tan, X., Bray, B. C., & Wagner, A. T., & Lanza, S. T. (2015). Lca Distal SAS macro users' guide (Version 3.0). University Park: The Methodology Center, Penn State. Download
• Lanza, S. T., Dziak, J. J., Huang, L., Wagner, A., & Collins, L. M. (2015). PROC LCA & PROC LTA users' guide (Version 1.3.2). University Park: The Methodology Center, Penn State. Download