A simple model of three economies with two currencies: the eurozone and the USA

This paper presents a Keynesian model which describes threecountries trading merchandise and financial assets with oneanother. It is initially assumed that all three countries haveindependent fiscal policies but that two of the countries sharea currency, hence the model can be used to make a preliminaryanalysis of the conduct of economic policy in ‘the eurozone’vis-à-vis the rest of the world—‘the USA’.The main conclusion will be that, if all three countries doindeed operate independent fiscal policies, the system willwork under a floating currency regime, but only so long as theEuropean central bank is prepared to modify the structure ofits assets by accumulating an ever rising proportion of billsissued by any ‘weak’ euro country.