Overconfidence, monetary policy committees and chairman dominance

Monetary policy decisions are typically characterized by three features: (i) decisions are made by a committee, (ii) the committee members often disagree, and (iii) the chairman is almost never on the losing side in the vote. We show that the combination of overconfident policymakers and a chairman with agenda-setting rights can explain all these features. The optimal agenda-setting power to the chairman is a strictly concave function of the degree of overconfidence. We also show that the quality of advice produced by the central bank staff is higher in a flat organization than in a hierarchical one.