Maintenance work on the ZORA database servers is scheduled for Thursday 25th July 2019 from 19:00-20:00. During this period ZORA and JDB will not be available. Thank you for your understanding.
Frick, Hannah; Strobl, Carolin; Zeileis, Achim (2015). Rasch Mixture Models for DIF Detection: a comparison of old and new score specifications. Educational and Psycological Measurement, 75(2):208-234.
Frick, Hannah; Strobl, Carolin; Zeileis, A (2014). To Split or to Mix? Tree vs. Mixture Models for Detecting Subgroups. In: COMPSTAT 2014 : 21st International Conference on Computational Statistics, Genf, 19 August 2014 - 22 August 2014, 378-386.