TY - JOUR T1 - Three-part random effect models for longitudinal skewed survey data with 'not applicable' responses AU - Buta, Eugenia AU - Simon, Patricia AU - Gueorguieva, Ralitza PY - 2025 DO - 10.3102/10769986251318028 JO - Journal of Educational and Behavioral Statistics SN - 1076-9986 ER -