Selma Bendjaballah holds a PhD Degree in political sciences. She is currently research engineer at Sciences Po (Centre for Socio Political Data- CDSP), where she also teaches (political sciences and qualitative methodology).
At the CDSP, Selma is in charge the development of research on social sciences methods.
Nicolas Sauger is Professor of political science at Sciences Po (Paris, France). He is the Director of the Center for Socio-Political Data, a center specialized on survey data collection and documentation. As such, he is in charge of the management of the European social survey and the Comparative study of electoral systems for France. He also runs the French probabilistic web panel Elipss. CSDP also manages the research data repository data.sciencespo.fr. Sauger has worked on political institutions, political behavior, and methods. More specifically, he is particularly interested in electoral systems, patterns of party competition, and comparative repeated surveys. He has published his works in a variety of journals such as the British Journal of Political Science, Electoral Studies, the European Journal of Political Research, Party Politics and Social Choice and Welfare.