Resumen de Vertical externalities with lump-sum taxes:: how much difference does unemployment make?

Diego Martínez López, Tomas Sjögren

• This paper analyses how the existence of unemployment a§ects the conventional ap- proach to vertical externalities. We discuss the optimality rule for the provision of public inputs both in an unitary and a federal country. Our Öndings show that decentralizing the spending responsability on public inputs can bring its optimality rule closer to the production e¢ ciency condition. Moreover, we describe the inability of the federal gov- ernment, behaving as Stackelberg leader, to replicate the unitary outcome, unless to have new policy instruments at governmentís disposal