Deliberative Voting

TitleDeliberative Voting
Publication TypeJournal Article
Year of Publication2007
AuthorsGerardi D, Yariv L
JournalJournal of Economic Theory
Pagination - 338
Date PublishedMay 2007
ISBN Number0022-0531, 0022-0531
KeywordsEquilibrium, Political Processes: Rent-seeking, Lobbying, Elections, Legislatures, and Voting Behavior (D72), Rules, Social Choice, Clubs, Committees, Associations (D71), Votes, Voting
AbstractWe analyze a model of jury decision making in which jurors deliberate before casting their votes. We consider a wide range of voting institutions and show that deliberations render these equivalent with respect to the sequential equilibrium outcomes they generate. In particular, in the context of a jury setup, all voting rules excluding the two types of unanimity rules (one requiring a unanimous consensus to acquit, one requiring a unanimous consensus to convict) induce the same set of equilibria outcomes. We show the robustness of our results with respect to several restrictions on communication protocols and jurors' strategies. Furthermore, we demonstrate that our observations extend to practically all of the voting structures commonly studied in the voting literature. The paper suggests the importance of accounting for communication in models of collective choice.