This paper explains a currency crisis as an outcome of a switch in how monetarypolicy and fiscal policy are coordinated. The paper develops a model of an open economy in which monetary policy starts active, fiscal policy starts passive and, in a particular state of nature, monetary policy...

Time consistency problems can arise when environmental taxes are employedto encourage firms to take irreversible abatement decisions. Setting a high carbontax, for instance, would induce firms to invest in low-carbon technology,yet once investment has occurred the government can then reduce the...

The uniqueness of bounded local equilibria under interest rate rules is analyzed in a model with sticky information à la Mankiw and Reis (2002). The main results are tighter bounds on monetary policy than in sticky-price models, irrelevance ofthe degree of output-gap targeting for determinacy,...

We use a two-country model with a central bank maximizing union-wide welfareand two fiscal authorities minimizing comparable, but slightly differentcountry-wide losses. We analyze the rivalry between the three authorities inseven static games. Comparing a homogeneous with a heterogeneous...

Recent attempts to incorporate optimal fiscal policy into NewKeynesian models subject to nominal inertia, have tended to assume that policymakers are benevolent and have access to a commitment technology. A separateliterature, on the New Political Economy, has focused on real economies...

In practice, central banks have been confronted with a trade-off between stabilising inflation and output when dealing with rising oil prices. This contrasts with the result in the standard New Keynesian model that ensuring complete price stability is the optimal thing to do, even when an oil...

While consumption habits have been utilised as a means of generating a hump shapedoutput response to monetary policy shocks in sticky-price New Keynesian economies,there is relatively little analysis of the impact of habits (particularly, external habits) onoptimal policy. In this paper we...

The tug-o-war for supremacy between inflation targeting and monetary tar-geting is a classic yet timely topic in monetary economics. In this paper, werevisit this question within the context of a pure-exchange overlapping genera-tions model of money where spatial separation and random relocation...

Faced with real and nominal shocks, what should a benevolent central bankdo, …x the money growth rate or target the inflation rate? In this paper, wemake a …rst attempt at studying the optimal choice of monetary policy in-struments in a micro-founded model of money. Speci…cally, we produce...

In models of money with an infinitely-lived representative agent (ILRA models), the optimal monetary policyis almost always the Friedman rule. Overlapping generations (OG) models are different: in this paper, westudy how they are different, and why. We investigate the welfare properties of...