This seminar introduces the Lavaan multilevel latent variable modeling framework and describes multilevel variance and effect decomposition, and then proceeds with multilevel path analysis, multilevel CFA, and multilevel SEM, including approaches for handling strong correlations at the between-group level, indirect effects (multilevel mediation), interaction effects (multilevel moderation), conditional indirect effects (multilevel moderated mediation), bootstrapping, and instrumental variable methods for identifying multilevel causal effects. An official Instats certificate of completion is provided at the conclusion of the seminar. For European PhD students, the seminar offers 2 ECTS Equivalent point.