Bei dem Neun-Sternchen-Problem geht es darum, neun regelmäßig in einem Quadrat angeordnete Sternchen mit vier zusammenhängenden geraden Linien zu verbinden. Das ist natürlich rein mathematisch gesehen unmöglich, solange man sich nur innerhalb des Quadrates bewegt. Lösbar wird die Aufgabe...

Should the generosity of unemployment benefits and the progressivity of income taxes depend on the presence of business cycles? This paper proposes a tractable model where there is a role for social insurance against uninsurable shocks to income and unemployment, as well as inefficient business...

We propose an integrated treatment of the problems of optimal monetary and fiscal policy, for an economy in which prices are sticky and the only available sources of government revenue are distorting taxes. Our linear-quadratic approach allows us to nest both conventional analyses of optimal...

We propose an integrated treatment of the problems of optimal monetary and fiscal policy, for an economy in which prices are sticky and the only available sources of government revenue are distorting taxes. Our linear-quadratic approach allows us to nest both conventional analyses of optimal...