I am an Assistant Professor in Political Science at Leiden University, the Netherlands. My main areas of interest include political representation, parliaments, political parties, elections, polls and voting advice applications.


I studied political science at Leiden University, obtaining my Master’s degree (cum laude) in 2006 and my PhD in 2011. Part of my PhD research was completed at the University of Nottingham, where I was a guest PhD researcher in 2008. My PhD thesis, written under supervision of Prof. Rudy Andeweg and Dr Huib Pellikaan deals with the the democratic mandate of political parties in Great Britain and the Netherlands. This dissertation was shortlisted for the ECPR Jean Blondel Prize.

After I completed my dissertation, I worked as a postdoctoral researcher in the Political Legitimacy research profile area at Leiden, a multi-disciplinary project involving history, law, political science and public administration. In addition, I taught at the Institute of Political Science.

From September 2013 to December 2015 I held the position of Assistant Professor in Political Science at Trinity College Dublin, Ireland. My responsibilities included teaching courses in research methods and statistics as well as comparative politics. I was Director of the M.Sc. in Politics & Public Policy in 2014-2015.

Current role

In January 2016 I took up the position of Assistant Professor (Universitair Docent) of Political Science at Leiden University. Currently, I am teaching statistics to undergraduate students and a thesis seminar project for postgraduates.

I fulfil various professional service roles. I am a steering committee member of the Standing Group on Parliaments, with particular responsibility for the summer school. In the V-Dem Project, I act as Regional Manager for Western Europe. In addition, I co-organized the Dutch Flemish Political Science conference Politicologenetmaal with Hans Vollaard, Corinna Jentzsch and Nicolas Blarel in Leiden in 2017-2018.

My outreach activities include polling aggregation in the Netherlands, published by the public broadcaster NOS, and Ireland. I am a regular contributor to the Dutch political science weblog Stuk Rood Vlees.

In September 2015 I received the Emerging Scholars Award from the Organized Section on Political Organizations and Parties of the American Political Science Association.

đź“„ Curriculum vitae

Research Themes

Parliaments: rules and behaviour

How do MPs and parties behave in parliament?

Political Representation: Linking Citizens and Representatives

Are representatives doing what people want?

Polling Aggregation

Peilingwijzer and the Irish Polling Indicator pool Dutch and Irish opinion polls respectively

Voting Advice Applications

VAAs help voters during elections. I study their design.

This paper shifts the analysis of parliamentary oversight tools to the level of the political party, asking how political parties make use of written parliamentary questions.
West European Politics, 41(2): 496-516, 2018.

The Dutch Parliamentary Behaviour Dataset contains a record of parliamentary (voting) behaviour in the Dutch Tweede Kamer (Second Chamber, House of Representatives) since 1945.
Acta Politica, 53(1), 149-166, 2018.

This article describes a statistical method for aggregating the information from Irish opinion polls.
Irish Political Studies 31(4): 541-566, 2016.

Recent Publications

More Publications

(2018). Parliamentary Questions as Strategic Party Tools. West European Politics, 41(2): 496-516.

PDF Code Dataset Project doi

(2018). Estimating Uncertainty in Party Policy Positions Using the Confrontational Approach. Political Science Research and Methods, 6(1): 197-209.

Code Dataset Accepted Manuscript doi

(2018). The Dutch Parliamentary Behaviour Dataset. Acta Politica, 53(1), 149-166.

PDF Dataset Project doi

(2017). Naar nieuwe verhoudingen tussen Kamer en kabinet?. In: Rudy B. Andeweg and Monique Leyenaar (eds). Alle stemmen tellen. Amsterdam: Amsterdam University Press..

Project Order book

(2017). Reaching across the aisle: Explaining government–opposition voting in parliament. Party Politics, 23(6): 746–759.

Project Accepted Manuscript doi


Currently teaching (2017-2018):

Blogs & popular publications

I am a regular contributer to Stuk Rood Vlees, a Dutch-language political science weblog. Please find an overview of my contributions here. Before April 2013, my blogs were published here.

A list of other recent popular publications and blogs is available here.


Interviews and mentions

I regularly share my research findings and observations regarding current events in media interviews with national and international outlets, including BBC World, Bloomberg, BNR, NOS, NRC Handelsblad, RTE, Volkskrant & ZDF.

A full list of recent interviews and mentions is available here

Recent & Upcoming Talks

More Talks

Beyond rigour: increasing the public relevance of political science and public administration
Thu, Nov 9, 2017 10:30
Rol en reikwijdte van de peilingen
Sat, May 13, 2017 00:00
Waarom zou je peilingen serieus nemen?
Tue, Apr 11, 2017 00:00
Waarom zou je peilingen serieus nemen?
Thu, Mar 30, 2017 00:00
Een verdeeld electoraat?
Wed, Mar 8, 2017 00:00