Leith and Wren-Lewis (2007) have shown that government debt is returned to its pre-shock level in a New Keynesian model under optimal discretionary policy. This has two important implications for monetary and fiscal policy. First, in a high-debt economy, it may be optimal for discretionary...

We generalise the analysis of inflation bias with dynamic Phillips curves in three respects. First, we examine the discretionary (time consistent) solution in cases where the Phillips curve has both a backward looking and forward-looking component. Second, we show that the commitment (time...

We analyse the stability of countries within a monetary union in the face of asymmetric shocks, using a simple but widely applicable model. We show that members of the union may be subject to severe, and possibly unstable, cycles following asymmetric shocks if there is a significant backward...

This paper investigates the importance of fiscal policy in providing macroeconomic stabilisation in a monetary union. We use a microfounded New Keynesian model of a monetary union which incorporates persistence in inflation and non-Ricardian consumers, and derive optimal simple rules for fiscal...

We analyse optimal discretionary games between a benevolent central bank and a myopic government in a New Keynesian model. First, when lump-sum taxes are available and public debt is absent, we show that a Nash game results in too much government spending and excessively high interest rates,...

This paper studies the interactions of fiscal and monetary policy when they stabilise a single economy against shocks in a dynamic setting. We assume that fiscal and monetary policies both stabilise the economy only by causing changes to aggregate demand. Our findings are as follows. If the both...

This Paper investigates the importance of fiscal policy in providing macroeconomic stabilisation in a monetary union. We use a microfounded New Keynesian model of a monetary union that incorporates persistence in inflation, and examine non-cooperative interactions of fiscal and monetary...

This paper adds a highly-leveraged financial sector to the Ramsey model of economic growth and shows that this causes the economy to behave in a highly volatile manner: doing this strongly augments the macroeconomic effects of aggregate productivity shocks. Our model is built on the financial...

This Paper presents a new model of the East Asian crisis that combines three elements – multiple equilibria, investment collapse, and moral hazard – in a single simple account. We locate the causes of the crisis in poor financial regulation, highly-geared financial institutions, and implicit...

This paper analyzes the impact of terms of trade and risk-premium shocks on a small open economy in an intertemporal, Dutch disease model, with international capital mobility. It is shown that when the economy experiences a permanent improvement in the terms of trade, the Dutch disease effect...