The Fiscal Theory of the Price Level (FTPL) is a promise to obtain price level determinacy even if the nominal interest rate is constant. The idea is that a unique current price level ensures that the present value government budget constraint holds. I establish that this idea hinges on the...

We study a new type of monetary-fiscal interaction in a heterogeneous-agent New Keynesian model with a fiscal block. Due to household heterogeneity, the stock of public debt affects the natural interest rate, forcing the central bank to adapt its monetary policy rule to the fiscal stance to...

Motivated by the surge in debt levels through the pandemic crisis, we revisit the issue of the optimal financing of public debt. In contrast with the existing literature, we find that the optimal response of inflation to a large increase in debt levels is a gradual but significant and...