If distortions in the labour market lead to inefficiently highunemployment, and policy makers cannot enter into a binding policy commitment before nominal wages are set, excessive inflation may result due to a credibility problem. This is the famous Kydland&Prescott - Barro&Gordon inflationary...

Progressive income taxes moderate wage demands by trade unions and thereby reduce unemployment, but alsothey reduce incentives to acquire skills and lower productivity of workers. The optimal response of the governmentto this dilemma is to choose a system of progressive taxes and to (partly)...