The demise of a postwar Keynesian policy paradigm of discretionary fiscal fine-tuning in pursuit of full employment is widely associated with the rise of a monetarist economic policy paradigm stressing fixed policy rules and money supply targets to secure price stability. Challenging these conventional wisdoms, and questioning the usefulness of the paradigm change framework, this article interrogates how far monetarism did replace Keynesian approaches to macroeconomic policy in the UK and US after the 1970s. Crucial aspects of monetarism – the commitment to abandon stabilisation policy and shift to fixed policy rules – were over-ridden shortly after brief, abortive attempts to use monetarism as a governing doctrine. A paradigm lens overstat...