Olivier Ethgen is an international expert on modeling and risk sharing agreements. He has an academic post at the Universite de Liege, and is a modeling consultant for GSK Biologicals. He holds a PhD in Public Health Sciences from Universite de Liege and an MSc in Mathematical Economics and Econometrics from Universite Pantheon Sorbonne (Paris I). Ulf Staginnus is Head of Health Economics & Outcome Research Europe at Novartis Oncology and author of the Health Economics blog www.healtheconomicsblog.com.