We study the choice of club membership, when member-countries national governments set their tax policies non-cooperatively. Federal policy (in the form of club membership) has a higher constitutional status than national policies (in the form of income tax rates). This allows federal policy to...

We study the choice of club membership, when member-countries' national governments set their tax policies non-cooperatively. Federal policy (in the form of club membership) has a higher constitutional status than national policies (in the form of income tax rates). This allows federal policy to...

Should a subset of member states of a federation be allowed to form a sub-union on some policy issue? When centralization is not politically feasible, allowing an enhanced cooperation agreement among a subset of countries permits the latter to gain benefits which would otherwise be lost....