Materials on Multi-Level Modelling
Introduction on Multi-Level Modelling, Benedetto Lepori (link)
Conceptual basis of Multi-Level Modelling, Barbara Antonioli Mantegazzini (link)
Modelling strategies of Multi-Level Modelling, Benedetto Lepori (link)
Useful references
Hox, J. (2010) Multilevel analysis: techniques and applications. Lawrence Erlbaum Associates.
Snijders, T., and Bosker, R. (2012) Multilevel analysis: an introduction to basic and advanced multilevel modeling. Sage.
Goldstein, H. (2011) Multilevel statistical models. Wiley.
Additional materials (soon available)