Double versus triple majorities: will the new voting rules in the council of the European Union make a difference?

Robert Thomson

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6 Citations (Scopus)


What impact will the Lisbon Treaty’s new system of voting in the Council have? After describing the new voting rules, this study develops a modelling approach to assess their likely impact. The first part of the analysis examines the extent to which proce- dural rules have affected the decision-making process in the recent past, since this will help assess the likely impact of the changes brought by the Lisbon Treaty. The second part of the analysis presents a counter-factual analysis of recent decisions, exploring what would have happened had the Lisbon rules been applied. The main finding is that even under the strong and unrealistic assumption that formal rules define the decision- making process, decision outcomes would have been the same in most cases. The paper concludes by discussing the features of Council decision-making that soften the impact of these rule changes.
Original languageEnglish
Pages (from-to)1221-1238
Number of pages18
JournalWest European Politics
Issue number6
Early online date8 Oct 2013
Publication statusPublished - 2013


  • Lisbon Treaty
  • voting rules
  • decision making process

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