People with a self-control problem often seek relief through social interactions rather than binding commitments. Thus, in self-help groups like Alcoholics Anonymous, Narcotics Anonymous etc, members are said to achieve better personal outcomes by mainly sharing their experiences. In other...

The decision-making rules of the European Union (EU) are defined in an incomplete contract signed by 15 national governments. The design of the contract defines the set of policy issues where it applies – in decision-making rules i.e. the majority rules and the division of powers among the...

A team must select among competing projects that differ in their payoff consequences for its members. Each agent chooses a project and exerts costly effort affecting its random completion time. When one or more projects are complete, agents bargain over which one to implement. A consensus...

In this paper we combine a non-cooperative decision-making game in a federal structure with two levels of interest and an incomplete contract which sets the rules of the game. The question we pose is how to combine ex ante efficiency of the design with ex post efficiency of the outcomes in the...

This Paper studies some of the many options facing EU leaders when choosing a viable voting system for the EU25+. It provides quantitative estimates of the efficiency and power distributions of the various EU voting schemes that are being considered. It also provides intuition on how various...

We examine who benefits when there is a strong leader in place, and those who benefit when a situation lacks a proper leader. There are fractious terrorist groups who seek to serve the same people in a common cause against a common enemy. The groups compete for rents obtained from the public by...

We develop an incomplete contract model to analyse the enlargement strategy of a club. An applicant is characterized by his wealth and the degree of conformity with the club standard. The club gains only from a fully reformed new member, but reform is costly. The club chooses between early...

I develop a model of group decision-making, in which a committee generates proposals and holds open discussions, but the ultimate decision is either taken by a leader (decision by authority) or by majority vote. Optimal communication processes are studied that combine both cheap talk statements...

In this paper, we evaluate the impact of Turkey's membership on EU voting. The aspects that we discuss are decision-making efficiency and the distribution of power in the EU's leading decision making body the Council of Ministers. We compare two alternative Council voting rules: those accepted...

The phenomenon of choice shifts in group decision-making is fairly ubiquitous in the social psychology literature. Faced with a choice between a ‘safe’ and ‘risky’ decision, group members appear to move to one extreme or the other, relative to the choices each member might have made...