Replication Data for: The power of prime ministers: evidence from 21 parliamentary democracies

This research assesses the extent to which 21st-century prime ministers exert power to influence policy adoption and implementation. Additionally, it examines executive centralisation by analysing prime ministers’ authority to hire and fire ministers, their governing style, tolerance of backbench critique, and control over their parliamentary party. The findings are based on an expert survey on prime ministerial power across 21 parliamentary democracies (Australia, Austria, Belgium, Canada, Denmark, Finland, Germany, Greece, Iceland, Ireland, Israel, Italy, Japan, Malta, Netherlands, New Zealand, Norway, Portugal, Spain, Sweden, and the United Kingdom), updating an earlier study. The dataset enables testing of theories of increasing prime ministerial power and centralisation, particularly trends towards presidentialisation and prime ministerialisation.