The Swiss debt brake served as a model for the new German budget rule. The two tools share the long-term goal of rendering fiscal policy sustainable by stabilising nominal debt as well as the short-term goal of smoothing the economic cycle. Debt brakes thus act as an automatic stabiliser within...

To monitor fiscal sustainability, this paper proposes a recursive algorithm derived from the law of motion of the debt-to-GDP ratio, subject to a government reaction function that links convergence to the targeted debt ratio with primary fiscal surpluses. Based on quarterly estimates of this...