Hox, J., & Van de Schoot, R. (2013). Robust Methods for Multilevel Analysis. In M. A. Scott, J. S. Simonoff and B. D. Marx (Eds.), The SAGE Handbook of Multilevel Modeling (pp. 387-402). London: SAGE Publications Ltd.
Emeritus Professor social science methodology
Joop occupies himself with data quality in surveys and analysis models for complex data. Recently, his studies are on non-response problems in surveys and interviewer effects. The complex data types are often multilevel or clustered data.