We provide an introduction to optimal fiscal and monetary policy using the primal approach to optimal taxation. We use this approach to address how fiscal and monetary policy should be set over the long run and over the business cycle. We find four substantive lessons for policymaking: Capital...

We study optimal fiscal and monetary policy in an environment where explicit frictions give rise to valued money, making money essential in the sense that it expands the set of feasible trades. Our main results are in stark contrast to the prescriptions of earlier flexible-price Ramsey models....

Intuitively, the observed 'home bias' in individual portfolios plausibly explains the international capital immobility in aggregate data reported by Feldstein and Horioka (1980) as well as the survival of taxes on capital income. These intuitions are examined explicitly in a model where random...