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...

We examine how emission taxes should be refunded to firms in order to create optimal incentives to invest in cleaner technologies. Since refunds cannot be made dependent on investments, an alternative way is to give back taxes to firms according to market shares. We show that universally...

In this paper we examine how individuals should be treated with respect to taxes, subsidies and agenda setting in constitutions in order to obtain efficient allocations of public goods and to limit tax distortions. We show that if public goods are socially desirable, the simple majority rule as...