My main areas of interest include political representation, parliaments, political parties, elections, polls and voting advice applications.
In 2011 I defended my PhD thesis on the democratic mandate of political parties in Great Britain and the Netherlands, which I wrote at Leiden University.
I am teaching in the field of comparative politics, research methods and statistics. Most of my undergraduate teaching materials can be found on Blackboard. Some material is available here.
Blogs & opinion polls
I regularly contribute to the Dutch political science weblog StukRoodVlees.nl. More recently, I have started to contribute to The Irish Politics Forum.
The Dutch public broadcaster NOS publishes my my aggregation of Dutch national opinion polls, called 'Peilingwijzer' (Polling Indicator). I also make the Irish Polling Indicator, which is published regularly on politicalreform.ie.
Keeping Promises: Voting Advice Applications and Political Representation
with Jan Fivaz and Daniel Schwarz
To what extent does the post-electoral legislative behaviour of Members of Parliament (MPs) correspond to their pre-electoral campaign pledges? Our analysis compares pre-electoral policy positions captured by VAAs and with post-electoral parliamentary voting. We study Switzerland and the Netherlands, which have some general characteristics in common like multi-party systems/governments and the extensive use of VAAs by parties and voters. But the two cases also differ in important respects, most notably regarding the electoral system, executive-legislative relations, and the degree of party discipline. We find that generally pledge fulfilment is reasonably high in both countries, the mechanisms that explain whether parties or candidates stick to their VAA positions differs strongly between countries.
This is a chapter in D. Garzia & S. Marschall (Eds.), Matching Voters with Parties and Candidates: Voting Advice Applications in Comparative Perspective. Colchester: ECPR Press.