Karen Maas worked for 12 years as a (senior) consultant and project leader in the field of environmental economics, sustainability and Corporate Social Responsibility. Since September 2007 she has worked at the Erasmus School of Economics and in 2009 she defended her PhD research on “Corporate Social Performance: From Output Level to Impact Level.” She works as an assistant professor at the Erasmus School of Economics, Business Economic department. She is involved at the Erasmus Centre for Strategic Philanthropy (ECSP) and the Erasmus Social Entrepreneurship Centre (ESEC). Karen conducts research in the field of impact measurement, corporate social responsibility, and strategic philanthropy. Karen is scientific director of the executive CSR courses at the Erasmus School of Accounting & Assurance. She is a member of the advisory board of “De Groene Zaak” and is a member of the board of the Erasmus Education Fund.