It is well known that rational bubbles can be sustained in balanced growth path of a deterministic economy when the return to capital r is equal to the growth rate g. When there is a lack of stores of value, bubbles can implement an efficient allocation. This paper considers a world where r...

It is well known that rational bubbles can be sustained in balanced growth path of a deterministic economy when the return to capital <I>r</I> is equal to the growth rate <I>g</I>. When there is a lack of stores of value, bubbles can implement an efficient allocation. This paper considers a world where <I>r</I>...</i></i></i>

This paper derives and estimates rules for fiscal policy that prescribe the optimal response to changes in unemployment and debt. We combine the reduced-form model of the economy from a linear VAR with a non-linear welfare function and obtain analytic solutions for optimal policy. The variables...