Thanh-Huyen Ballmer-Cao is professor emerita of political science at the University of Geneva and the University of Zurich where she taught political behaviour. She directed several research projects, in particular the National Research Programme «Women, law and society: paths towards equality» (1991-1996). She was director of the Department of political science of the University of Geneva and head of the doctoral Program in Gender Studies of the Universities Geneva and Lausanne (2002-2008). Her publications are mainly focusing on political behaviour, electoral systems and political elites. The gender dimension thereby takes an important place.