We consider a general equilibrium model where groups operating in a competitive market environment can have several members and make efficient collective consumption decisions. Individuals have the option to leave the group and make it on their own or join another group. We study the effect of...

The relationship between our general equilibrium model with multi- member households and club models with multiple private goods is investigated. The main distinction in the definitions consists of the equilibrium concepts. As a rule, competitive equilibria among households where no group of...

We develop a model that combines competitive exchange of private commodities across endogenously formed groups with public good provision and global collective decisions. There is a tension between local and global collective decisions. In particular, we show that group formation and collective...

We introduce democratic mechanisms where individual utilities are not observable by other people at the legislative stage. We show that the combination of three rules can yield e±cient provision of public projects: first, flexible and double majority rules where the size of the majority depends...

In this paper we introduce flexible majority decision rules where the size of the majority depends on the proposal made by the agenda setter. Flexible majority rules can mitigate the disadvantages of democracies in the provision of public projects. In many cases, the combination of the...

We study how to efficiently motivate policy-makers to solve political multitask problems. Political multi-task problems typically have outcomes that are difficult to measure. Moreover, there are conflicts among citizens about optimal policies and the agents have the power to tax the citizens to...

In this paper we introduce flexible majority decision rules where the size of the majority depends on the proposal made by the agenda setter. Flexible majority rules can mitigate the disadvantages of democracies in the provision of public projekts. In many cases, the combination of the priciples...