The use of government fiscal stimulus to support the economy in the recent economic crisis has brought increases in government deficits and increased government debt. This has produced an interest in sustainable government debt and the role of deficits in the economy. This paper argues in favor...

This paper proposes a tractable framework to analyze fiscal space and the dynamics of government debt, with a possibly binding zero lower bound (ZLB) constraint. Without the ZLB, a greater primary deficit unambiguously raises debt. However, debt need not explode: When R G - φ, where φ is the...