League tables for literacy survey data based on random effect models

Welcome to the 23d International Workshop on Statistical Modelling, welcome to Utrecht. In this volume you will find all contributions by invited speakers, contributing speakers, and poster presenters. Following a long tradition, the proceedings will be ready at the beginning of the workshop. For the first time the proceedings are also provided as a PDF file on a USB stick. This allows you to see colour figures and to enlarge details in graphs. The International Workshop on Statistical Modelling (IWSM) has been held in Europe, USA and Australia since 1986. It has always been focused on papers that are motivated by real-life data and that make novel contributions to the subject of Statistics. Statistical Modelling is an important cornerstone in many scientific disciplines, and the workshop has consistently provided a rich environment for cross-fertilization of ideas from different statistical areas. The workshop has brought together scientists from different nationalities with different backgrounds and experience, and has always promoted contributions from students early in their careers, allowing time for discussion and interchange between junior and senior scientists.