In October 1979 the Federal Reserve, in an attempt to curb double-digit inflation, announced that it would place more weight on monetary aggregates in policy deliberations. This policy shift helped reduce inflation but sent the economy into a recession. Three years later the Fed abandoned...

Despite the long history and the substantial evidence supporting the conclusion that persistent changes in the price level are associated with changes in the money supply, the predicted association remains dis-puted. Is it debated because the empirical relationship holds over time periods so...