There are many situations in which different groups make collective decisions by committee voting, with each group represented by a single person. A natural question is what voting system such a committee should use. Concepts based on voting power provide guidelines for this choice. The two most...

We extend approval voting so as to elect multiple candidates, who may be either individuals or members of a political party, in rough proportion to their approval in the electorate. We analyze two divisor methods of apportionment, first proposed by Jefferson and Webster, that iteratively...

We analyze the effect of handicaps on turnout. A handicap is a difference in the vote tally between alternatives that strategic voters take as predetermined when they decide whether to turn out for voting. Handicaps are implicit in many existing democratic procedures. Within a costly voting...

In two laboratory surveys run in France during the 2014 European Elections, we asked the participants to provide their personal evaluations of the parties in terms of ideological proximity, and asked how they would vote under three proportional, closed-list voting rules: the (official)...

Electoral reform creates new strategic coordination incentives for voters, but these effects are difficult to isolate. We identify how the reform of the Norwegian electoral system in 1919, when single-member districts (SMDs) were replaced with multi- member proportional representation (PR),...

In this study, we implement a series of voting games in the laboratory to test whether a strategic voting behavior in a proportional system would arise and induce a two-party system. In each voting game, a finite number of subjects with single-peaked preferences, uniformly distributed on a...

This paper proposes a structural approach to measuring the effects of electoral accountability. We estimate a political agency model with imperfect information in order to identify and quantify discipline and selection effects, using data on U.S. governors. We find that the possibility of...

A fat and a healthy good provide immediate gratification, and cause health costs or benefits in the long run, which are misperceived. Additionally, the fat good (healthy good) increases (decreases) health care costs by increasing (decreasing) the probability of suffering from a chronic disease...

Models of political competition portray political candidates as seeking the support of the median voter to win elections by majority voting. In practice, political candidates seek supermajorities rather than majorities based on support of the median voter. We study the political benefits from...