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PhD Defence

Achieving Party Unity: A Sequential Approach to Why MPs Act in Concert

Wednesday 2 March 2016
Academy Building
Rapenburg 73
2311 GJ Leiden

Cover dissertation Cynthia van Vonno (Achieving Party Unity)

When it comes to voting, party group unity is the rule rather than the exception in most (European) parliamentary democracies. But how do individual MPs come to their decision to vote according to the party group line?

In her dissertation Achieving Party Unity: A Sequential Approach to Why MPs Act in Concert, political scientist Cynthia van Vonno (Leiden University) finds that—contrary to what is often (implicitly) assumed—party discipline is seldom necessary to get MPs to toe the party group line. Rather, parliamentarians vote with their party group of their own accord, either as a result of cue-taking, simple agreement, or because they subscribe to the norm of party loyalty.


  • Prof. dr. R.B. Andeweg


Ph.D. defenses are free to attend, you do not have to register.

Ph.D. Theses

Ph.D. theses by Leiden Ph.D. students are available digitally through the Leiden Repository after the defense. The site offers free access to these Ph.D. theses. However, in some cases a thesis may be under embargo temporarily and access to its full-text version will only be granted later.

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Inès van Arkel, Scientific Communication Adviser, Universiteit Leiden
T: 071 -5273282
E:   i.van.arkel@bb.leidenuniv.nl

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