Milton Friedman, the Demand for Money and the ECB’s Monetary-Policy Strategy

The European Central Bank (ECB) assigns a greater weight to the role of money in its monetary-policy strategy than most, if not all, other major central banks. Nevertheless, reflecting the view that the demand for money became unstable in the early-2000s, some commentators in the press have reported that the ECB has “downgraded” the role of money-demand functions in its strategy. This paper explains the ECB’s monetary-policy strategy and shows the considerable influence of Milton Friedman’s contributions on the formulation of that strategy. The paper also provides new evidence on the stability of euro-area money-demand. Following a conjecture made by Friedman (1956), we assign a role to uncertainty in the money-demand function. We find that, although uncertainty is mean–reverting, it is none-the-less non-stationary, subject to wide swings, and has substantial effects on the demand for money.