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Title: Abortions, Brexit and Trees

Author(s): Andreas Kleiner and Benny Moldovanu

Publication Date: December 2019

Keyword(s): agenda, Revealed Preference and voting

Programme Area(s): Industrial Organization

Abstract: We study how parliaments and other committees vote to select one out of several alternatives in situations where not all available options can be ordered along a "left-right" axis. Practically all democratic parliaments routinely use Sequential Binary Voting Procedures in order to select one of several alternatives. Which agendas are used in practice, and how should they be designed ? We assume that preferences are single-peaked on an arbitrary tree and we study convex agendas where, at each stage in the sequential, binary voting process, the tree of remaining alternatives is divided in two subtrees that are subjected to a binary Yes-No vote. In this wide class of situations we show that dynamic, strategic voting is congruent with sincere, unsophisticated voting even if agents are privately informed, and no matter what their beliefs about other voters are. We conclude the paper by illustrating the empirical implications of our results for two large case studies from Germany and from the UK.

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Bibliographic Reference

Kleiner, A and Moldovanu, B. 2019. 'Abortions, Brexit and Trees'. London, Centre for Economic Policy Research. https://cepr.org/active/publications/discussion_papers/dp.php?dpno=14183