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...

In countries with credible inflation targeting, it seems plausible to suggest that instead of forming a rational expectation, some firms (inflation-targeters) might simply expect future inflation to always equal its target. This paper analyses the implications of this for optimal monetary policy...