What are the best quorum rules? A laboratory investigation
Many political systems with direct democracy mechanisms have adopted rules preventing decisions from being made by simple majority rule. The device added most commonly to majority rule in national referendums is a quorum requirement. The two most common are participation and approval quorums. Such rules are responses to three major concerns: the legitimacy of the referendum outcome, its representativeness, and protection of minorities regarding issues that should demand a broad consensus. Guided by a pivotal voter model, we conduct a laboratory experiment to investigate the performances of different quorums in attaining such goals. We introduce two main innovations in relation to previous work on the topic. First, part of the electorate goes to the polls out of a sense of civic duty. Second, we test the performances of a different quorum, the rejection quorum, recently proposed in the literature. We conclude that, depending on the preferred criterion, either the approval or the rejection quorum is the best.
KeywordsElection design Participation quorum Approval quorum Laboratory experiment
JEL ClassificationC91 D72 D02
This paper is financed by National Funds of the FCT—Portuguese Foundation for Science and Technology within the projects UID/ECO/03182/2019 and UID/SOC/50013/2019, and the research grant PTDC/IVC-CPO/4925/2014, with the FCT/MEC’s (Fundação para a Ciência e a Tecnologia, I.P.) financial support through national funding and by the ERDF through the Operational Programme on “Competitiveness and Internationalization–COMPETE 2020” under the PT2020 Partnership Agreement.
- Bock, O., Nicklisch, A., & Baetge, I. (2012). hroot: Hamburg registration and organization online tool. WiSo-HH working paper series No. 1.Google Scholar
- Donnelly, B. (2016). After Brexit: the light at the end of the tunnel is several oncoming trains. Social Europe. Retrieved July 18, from https://www.socialeurope.eu/2016/07/light-end-tunnel-several-oncoming-trains.
- Kaufmann, B., Büchi, R., & Braun, N. (2010). Guidebook to direct democracy in Switzerland and beyond. Marburg: Initiative & Referendum Institute Europe.Google Scholar
- Ladha, K., Miller, G., & Oppenheimer, J. (1996). Information aggregation by majority rule: Theory and experiments. Seattle: Washington University Typescript.Google Scholar
- LeDuc, L. (2003). The politics of direct democracy: Referendums in global perspective. Toronto: Broadview Press.Google Scholar
- Qvortrup, M. (2005). A comparative study of referendums. Manchester: Manchester University Press.Google Scholar
- Suksi, M. (1993). Bringing in the people: a comparison of the constitutional forms and practices of the referendum. Dordrecht: Martinus Nijhoff Publishers.Google Scholar
- Tierney, S. (2016). The Scottish independence referendum: a model of good practice in direct democracy? In Aileen McHarg, Tom Mullen, Alan Page, & Neil Walker (Eds.), The Scottish independence referendum: constitutional and political implications (pp. 53–73). Oxford: Oxford University Press.CrossRefGoogle Scholar
- Vatter, A. (2000). Consensus and direct democracy: Conceptual and empirical linkages. European Journal of Political Research, 38(2), 171–192.Google Scholar
- Verhulst, J., & Nijeboer, A. (2007). Direct democracy: facts and arguments about the introduction of initiative and referendum. Brussels: Democracy International.Google Scholar
- West, F. C. (1985). A crisis of the Weimar Republic: A study of the German referendum of 20 June 1926. Philadelphia PA: American Philosophical Society.Google Scholar
- Whitehead, L. (2017). Afterword on Brexit referendum, 23 June 2016—the ‘People Ruled’ that the UK should quit the European Union. In S. P. Ruth, Y. Welp, & L. Whitehead (Eds.), Let the people rule? Direct democracy in the twenty-first century (pp. 221–226). Colchester: ECPR Press.Google Scholar