Tom Louwerse is a political scientist and Professor of Political Behaviour and Research Methods at Leiden University, where he studies and teaches elections, political representation and parliamentary politics in the Netherlands and other established democracies. He also serves as Vice-Dean of Research and Impact at the university’s Faculty of Social and Behavioural Sciences. His research explores Dutch politics, opinion polls, parliaments and the conduct of political parties and representatives, with a recent focus on parliamentary opposition.

Louwerse is co-author of Governance and Politics of the Netherlands and co-editor of the Oxford Handbook of Dutch Politics. He created and maintains Peilingwijzer, a project that aggregates election polls, and shares research through publications, blogs, talks and media interviews. His website provides information about his biography, teaching, research projects and publications, along with access to replication materials and parliamentary behaviour data.

These resources include the Dutch Parliamentary Behaviour Dataset and an associated R package. Louwerse also contributes political analysis to Dutch and international media outlets and communicates with audiences through online platforms