Business cycles reflect changes over time in the amount of trade between individuals. In this paper we show that incorporating explicitly intra-temporal gains from trade between individuals into a macroeconomic model can provide new insight into the potential mechanisms driving economic...

This paper discusses the conditions under which currency unions would be desirable and viable. We discuss and present new empirical evidence concerning the operation of existing currency unions in federal states and among regional country groupings. In particular, we examine the traditional...

As a companion to a previous paper, monetary and fiscal policy are analyzed in (a) a small open economy and (b) a two-country world, where in addition to a fixed wage causing unemployment, countries now produce specialized products whose prices are fixed, causing excess supply. There are two...

This paper offers a critique of the UK government's Medium Term Financial Strategy from a policy optimization perspective. It argues that recent versions of the MTFS can be interpreted as representing the outcome of a policy optimization exercise, but that certain key aspects remain unclear....

This survey essay considers how rational expectations have changed our evaluation of monetary policy. In the first section, various underpinnings of the "Phillips curve" relation between inflation and output are reviewed. All are concluded to be products of particular institutional set-ups whose...

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 consider a simple general equilibrium model for the determination of asset prices together with full equilibria in the commodity and money markets. In this way portfolio aspects are introduced into a dynamic macro model which has many features from growth theory. Money holdings are modelled...

The persistence of large trade and budget imbalances has led to increasing demands for protectionist policies. Despite a substantial theoretical literature there appears to be no empirical literature on the use of tariffs as a macroeconomic policy instrument. This paper fills that gap, using the...

The possible emergence of a monetary union in Europe raises a number of new and difficult questions. A central concern is the implication for fiscal policy-making. Fiscal policy assumes an increased importance once the monetary policy instrument is lost. The Delors Report has suggested that...

The paper provides an account of the current global economic situation, outlook and policy options. Medium-term prospects are mediocre and fraught with considerable downside risk. Fiscal and monetary policy options for the main industrial countries to improve global economic performance are...