The partisan foundations of parliamentary speech. How parliamentary party groups decide who gets to speak for them

This study examines how parliamentary party groups decide who speaks for them on specific issues in parliament. We build on three strands of the literature: the work on the institutional foundations of parliamentary speech; the literature on committee assignments in parliamentary systems which points to different rationales behind parliamentary specialisation and the division of labour; and the literature on issue competition. First, we expect that the party leadership will assign more speaking time on issues that parties ‘own’ to Members of Parliament (MPs) they favour. Second, we expect an informational rationale regarding the allocation of speaking time by which MPs speak on issues for which they have pre-existing expertise. Third, we expect MPs to speak on issues if they have ties to relevant constituencies outside parliament. We analyse a new data set of all speeches in the Dutch lower house between 1998–2017. The analyses point to the importance of two rationales in the allocation of speaking time: high-status MPs (reflected by their list positions) speak on issues that parties prioritise, and MPs speak on issues of which they have specialised knowledge. Our analyses shed important light on how parliamentary party groups (PPGs) function, specifically how they divide labour within their ranks.