Dr. Birgit Müller is head of the Helmholtz Centre for Environmental Research’s working group on Policy Instruments and Socio-Environmental Systems (POLISES) under Global Change. Birgit uses agent-based models (ABMs) to study intended and unintended effects of global policy instruments on the social-ecological resilience of smallholders. In this work, Birgit and her team focus on the impact of policies targeting climate risk in two common property regimes of pastoralists in Africa (Morocco and Kenya/Ethiopia). More generally, Birgit is part of an international team of modelers, psychologists, and natural scientists working to develop adequate representations of human behavior in ABMs. She is interested in how to describe models in an appropriate and standardized manner to increase their comprehensibility and comparison. Having studied Economic Mathematics at the University of Leipzig (Germany), she holds a PhD in Applied System Science from the University of Osnabrück, Germany. Birgit served as a member of SESYNC’s External Advisory Board.