Maas is a full professor at the Accounting Section of the Amsterdam Business School. In his research he uses lab experiments and judgment and decision-making tasks to study how individuals use and produce accounting information. He’s on the editorial board of several academic journals, has worked as an associate editor at European Accounting Review and is the coordinator of the European Network for Experimental Accounting Research (ENEAR). At UvA EB, he teaches Financial Accounting and Judgment & Decision Making. He’s also the Chair of the Economics and Business Ethics Committee (EBEC).