Friedman (1968) - his famous Presidential Address to the American Economic Association - contains an elementary error right at the heart of what is usually supposed to be the paper's crucial argument.  That is the argument to the effect that during an inflation, changing expectations shift in...

The 'expectations critique', usually attributed to Friedman or Phelps and dated towards the end of the 1960s, in fact originates much earlier.  And rather than being an insight properly attributable to a particular individual, it was, by that time, a commonplace of economic discussion.  This...