Fiscal Dominance and the Maturity Structure of Debt

We develop a dynamic model of monetary-fiscal interactions and government debt. We introduce a novel channel of fiscal dominance through the maturity structure. Faced with an expansionary fiscal policy shock, extending debt-maturity under fiscal dominance becomes a strategic tool for maintaining debt sustainability without immediate price-level adjustments by the monetary authority. We show that extending the maturity of debt raises the interest burden of debt. To validate the results empirically, we assemble a novel central government security level dataset between 1999-2022 for India. We find that the probability of issuing a long-term security is approximately 7 percentage points higher in a fiscal dominant regime compared to a monetary dominant regime. Using the approach in Hall and Sargent (2011) for debt-decomposition, we show that the nominal return on marketable and non-marketable debt is the largest component driving public debt increases in periods of fiscal dominance between 1999-2022. Our paper highlights the ’maturity-structure’ channel of fiscal dominance, and provides a framework to quantify the impact of fiscal dominance on the interest-rate burden of sovereign debt in a large emerging market economy.