"Why is inflation persistently high in some periods and low in others? The reason may be absence of commitment in monetary policy. In a standard model, absence of commitment leads to multiple equilibria, or expectation traps, even without trigger strategies. In these traps, expectations of high...

A policy of forward guidance has been suggested either as a form of commitment (\Odyssean") or as a way of conveying information to the public (\Delphic"). I analyze the strategic interaction between households and the central bank as a game in which the central bank can send messages to the...