He received his Master’s degree in Psychology from the University of Amsterdam and his Ph.D in Social Psychology from Leiden University. His dissertation dealt with the role of fairness in negotiation. Since then he has moved more towards the fields of Behavioral Economics and Decision Making. In 2006 he visited Columbia University’s Center for Research on Environmental Decisions (CRED), where he is a Principal Investigator. He is also a board member of the European Association for Decision Making (EADM).