The United Kingdom

Abstract

We describe the institutional setting of parliamentary debate in the UK House of Commons and assess the determinants of participation in Commons’ debates using data on more than two million speeches from 1979 to 2019. We show that the main determinant of participation in parliamentary debate in the UK is whether an MP holds an institutionally powerful position in either the government or opposition parties. In addition, we describe two patterns in the evolution of debate behavior in the Commons over time. First, although MPs in government and opposition leadership positions give more speeches than backbench MPs in all periods that we study, the speechmaking “bonus” these actors enjoy has decreased over time. Second, MPs have increasingly employed constituency-oriented language in their parliamentary speeches over the past forty years, a finding we link to theoretical accounts of legislative competition in personal-vote-seeking electoral systems.