Debt non-neutrality, policy interactions, and macroeconomic stability

We study the consequences of non-neutrality of government debt for macroeconomic stabilization policy in an environment where prices are sticky. Assuming transaction services of government bonds, Ricardian equivalence fails because public debt has a negative impact on its marginal rate of return and thus on private savings. Stability of equilibrium sequences requires a stationary evolution of real public debt, which steers inflation expectations and rules out endogenous fluctuations. Under anti-inflationary monetary policy regimes, macroeconomic fluctuations tend to decrease with the share of tax financing, which justifies tight debt constraints. In particular, a balanced budget policy stabilizes the economy under cost-push shocks, such that output and inflation variances can be lower than in a corresponding case where debt is neutral.