Stefan gave two presentations:

– “Individual vs Group Level Measurement: Implications for Health Care Outcomes Economics”.
Symposium 1 – Plenary Session,  Tuesday April 21, 8.15 am – 9.45 am

– with Thomas Salzberger: “Investigating a Lack of Discrimination between Two Adjacent Response Categories in the Rasch Model for Ordered Categories in Health Measurement”
Paper Session 9A, Wednesday April 22, 1.30 pm – 3.00 pm

Stefan also moderated Paper Session 4A  on Tuesday April 21, 1.30 pm to 3.30 pm.