Romain Lachat

Romain Lachat is Full Professor at CEVIPOF-Sciences Po, which he joined in 2016.

He obtained his PhD in political science at the University of Zurich in 2014, and his Habilitation in 2019 at Sciences Po. He was a visiting scholar at the political science departments of the University of Montreal (2006-2007) and of New York University (2007-2008). He also worked at the Department of Political and Social Sciences at Pompeu Fabra University, Barcelona, as visiting professor (2010-2014) and associate professor (2014-2015).

His research focuses on the comparative analysis of electoral behaviour and on political representation. He is particularly interested in the impact of political institutions and party characteristics on individual-level behaviour.     He has published in several international political science journals, including the British
Journal of Political Science, Comparative Political Studies, Electoral Studies, the European Journal of Political Research, Political Behavior, and West European Politics.

• Joris Frese, Simon Hix, Romain Lachat. Quality Not Quantity: How a VAA Affected Voting Behavior in Three Large-Scale Field Experiments. British Journal of Political Science, 2025, 55, pp.e176. ⟨10.1017/S000712342510118X⟩. ⟨hal-05423769⟩
• Romain Lachat. Party Stances on Direct and Deliberative Democracy. French Democracy in Distress, Springer Nature Switzerland, pp.83-108, 2025, French Politics, Society and Culture, ⟨10.1007/978-3-031-92213-8_4⟩. ⟨hal-05336451⟩
• Davide Angelucci, Marco Improta, Romain Lachat, Davide Vittori. Time will tear us apart: European electoral participation dynamics in longitudinal perspective. Electoral Studies, 2024, 90, pp.102819. ⟨10.1016/j.electstud.2024.102819⟩. ⟨halshs-04637854⟩
• Romain Lachat, Jean-François Laslier. Alternatives to plurality rule for single-winner elections: When do they make a difference?. European Journal of Political Economy, 2024, 81, ⟨10.1016/j.ejpoleco.2024.102505⟩. ⟨halshs-04630321⟩
• Romain Lachat. Switzerland: The decline of the religious cleavage. José Ramón Montero; Paolo Segatti; Kerman Calvo. Religious Voting in Western Democracies, Oxford University Press, pp.466-481, 2023. ⟨hal-04637856⟩
• Eric Guntermann, Romain Lachat. Policy Preferences Influence Vote Choice When A New Party Emerges: Evidence from the 2017 French Presidential Election. Political Studies, 2023, 71 (3), pp.795-814. ⟨10.1177/00323217211046329⟩. ⟨hal-03885212⟩
• André Blais, Damien Bol, Shaun Bowler, David Farrell, Annika Fredén, et al.. What Kind of Electoral Outcome do People Think is Good for Democracy?. Political Studies, 2023, ⟨10.1177/00323217211055560⟩. ⟨hal-03423514⟩
• Romain Lachat. Gethin (Amory), Martínez-Toledano (Clara), Piketty (Thomas) – Clivages politiques et inégalités sociales. Une étude de 50 démocraties (1948-2020). Revue Française de Science Politique, 2022, 72 (1), pp.203-204. ⟨hal-03897423⟩
• Lorenzo de Sio, Romain Lachat (Dir.). Conflict Mobilisation or Problem-Solving? Issue Competition in Western Europe. Routledge, 2021, 9780367710828. ⟨hal-03897358⟩
• Romain Lachat, Eftichia Teperoglou. Institutional and Party System Effects. Hermann Schmitt; Paolo Segatti; Cees van der Eijk. Consequences of Context: How the Social, Political, and Economic Environment Affects Voting, Rowman & Littlefield, pp.89-109, 2021. ⟨hal-03897374⟩
• Alina Vrânceanu, Romain Lachat. Do parties influence public opinion on immigration? Evidence from Europe. Journal of Elections, Public Opinion and Parties, 2021, 31 (1), pp.1-21. ⟨10.1080/17457289.2018.1554665⟩. ⟨hal-03896953⟩
• Sylvia Kritzinger, Martial Foucault, Romain Lachat, Julia Partheymüller, Caroliona Plescia, et al.. Rally round the flag’: the COVID-19 crisis and trust in the national government. West European Politics, 2021, ⟨10.1080/01402382.2021.1925017⟩. ⟨hal-03566510⟩
• Lorenzo de Sio, Romain Lachat. Conflict Mobilisation or Problem-solving? Issue Competition in Western Europe. West European Politics, 43 (3), 2020. ⟨hal-03897441⟩
• Lorenzo de Sio, Romain Lachat. Making sense of party strategy innovation: challenge to ideology and conflict-mobilisation as dimensions of party competition. West European Politics, 2020, 43 (3), pp.688-719. ⟨10.1080/01402382.2019.1655967⟩. ⟨hal-03897346⟩
• Lorenzo de Sio, Romain Lachat. Issue competition in Western Europe: an introduction. West European Politics, 2020, 43 (3), pp.509-517. ⟨10.1080/01402382.2019.1655957⟩. ⟨hal-03896987⟩
• Peter Selb, Sascha Göbel, Romain Lachat. How to Poll Runoff Elections. Public Opinion Quarterly, 2020, 84 (3), pp.776-787. ⟨10.1093/poq/nfaa039⟩. ⟨hal-03896977⟩
• Romain Lachat, Elie Michel. Campaigning in an unprecedented election. issue competition in the French 2017 presidential election. West European Politics, 2020, Conflict Mobilisation or Problem-solving? Issue Competition in Western Europe, 43 (3), pp.565-586. ⟨10.1080/01402382.2019.1655960⟩. ⟨hal-02382986⟩
• Romain Lachat. France: Setting the stage for 2022. Lorenzo De Sio; Mark N. Franklin; Luana Russo. The European Parliament Elections of 2019, Luiss University Press, pp.141-146, 2019, 9788861054110. ⟨hal-03897426⟩
• Romain Lachat. Party strategies, institutions, and electoral system effects. Peter John Loewen; Daniel Rubenson. Duty and Choice: The Evolution of the Study of Voting and Voters, University of Toronto Press, pp.237-256, 2019. ⟨hal-03897425⟩
• Romain Lachat. Bedock (Camille) – Reforming Democracy: Institutional Engineering in Western Europe. Revue Française de Science Politique, 2019, 69 (3), pp.513-514. ⟨10.3917/rfsp.693.0510⟩. ⟨hal-03897424⟩
• Karine van Der Straeten, Romain Lachat, Jean-François Laslier. Strategic Voting in Multiwinner Elections with Approval Balloting: An Application to the 2011 Regional Government Election in Zurich. Laura B. Stephenson; John H. Aldrich; André Blais. The Many Faces of Strategic Voting: Tactical Behavior in Electoral Systems Around th World, University of Michigan Press, pp.178-202, 2018. ⟨halshs-02103123⟩
• Romain Lachat, Aiko Wagner. How party characteristics drive voters' evaluation criteria. Electoral Studies, 2018, 55, pp.11 - 20. ⟨10.1016/j.electstud.2018.06.008⟩. ⟨hal-03399605⟩
• Pavlos Vasilopoulos, Romain Lachat. Authoritarianism and political choice in France. Acta Politica, 2018, 53 (4), pp.612 - 634. ⟨10.1057/s41269-017-0066-9⟩. ⟨hal-03413599⟩
• Romain Lachat. Which way from left to right?. International Political Science Review, 2018, 39 (4), pp.419 - 435. ⟨10.1177/0192512117692644⟩. ⟨hal-03399613⟩
• Romain Lachat. Associative Issue Ownership and Candidate Preferences in the 2017 French Presidential Election. Brigid Laffan; Lorenzo Cicchi. 2017: Europe's Bumper Year of Elections, European University Institute, pp.223-239, 2018. ⟨hal-03897427⟩
• Romain Lachat. Routledge Handook of European Elections, edited by D. M. Viola. Journal of Common Market Studies, 2017, 55 (1), pp.154-154. ⟨10.1111/jcms.12493⟩. ⟨hal-03571041⟩
• Romain Lachat. Value Cleavages. Kai Arzheimer; Jocelyn Evans; Michael Lewis-Beck. The Sage Handbook of Electoral Behaviour, SAGE Publications, pp.561 - 583, 2017, 9781473913158. ⟨hal-03567644⟩
• Romain Lachat. De l’attractivité des partis politiques. 2016. ⟨hal-03469953⟩
• Romain Lachat. The Role of Party Identification in Spatial Models of Voting Choice. Political Science Research and Methods, 2015, 3 (3), pp.641 - 658. ⟨10.1017/psrm.2015.2⟩. ⟨hal-03399230⟩
• Romain Lachat, Hanspeter Kriesi. “Voluntary PR Voting” in the Election of Swiss Regional Governments. Revue suisse de science politique/Swiss Political Science Review, 2015, 21 (3), pp.419 - 436. ⟨10.1111/spsr.12152⟩. ⟨hal-03399229⟩
• Romain Lachat, André Blais, Ignacio Lago. Assessing the Mechanical and Psychological Effects of District Magnitude. Journal of Elections, Public Opinion and Parties, 2015, 25 (3), pp.284 - 299. ⟨10.1080/17457289.2014.1002791⟩. ⟨hal-03399234⟩
• Romain Lachat, Jean-François Laslier, Karine van Der Straeten. Strategic Voting under Committee Approval: An Application to the 2011 Regional Government Election in Zurich. 2015. ⟨halshs-01168743⟩
• Romain Lachat. Leader Effects and Party Polarization. Marina Costa Lobo; John Curtice. Personality Politics?, Oxford University Press, pp.105 - 123, 2015, 9780199660124. ⟨hal-03568297⟩