Memories can be tricky. I have long been haunted by the inflation of the 1970s. Fifty years ago, when I had just started my career as a professional economist at the Federal Reserve, I was witness to the birth of the Great Inflation as a Fed insider. That left me with the recurring nightmares of a financial post-traumatic stress disorder. The bad dreams are back.

They centre on the Fed’s legendary chairman at the time, Arthur F. Burns, who brought a unique perspective to the US central bank as an expert on the business cycle. In 1946, he co-authored the definitive treatise on the seemingly rhythmic ups and ...