Co-authored with Marcus Miller
Across Europe, austerity policies have caused stagnation and despair. There is a more humane way to restore our fortunes.
Lionel Robbins defined economics as the study of the allocation of scarce resources among competing uses. For an economy at full employment, where the opportunity cost of government spending is the private spending it displaces, this remains a good characterisation. But what if there is a deficiency of aggregate demand, so the nation’s resources are being underused – as evidenced by significant involuntary unemployment? In this case, in so far as it employs unused capacity, expenditure by the government will add to the resources available for investment and consumption. This is conventionally measured by the “multiplier” – the ratio of extra output available per unit of government expenditure. If the multiplier is equal to one, for example, there is no opportunity cost to public spending, in effect: the resources would otherwise be unused.