Assar Lindbeck's dissertation is strongly influenced mainly by Don Patinkin's and Bent Hansen's way of macroeconomic analysis using a neoclassical general equilibrium model. Monetary theory is developed in the spirit of Gurley & Shaw with a number of financial intermediaries, like banks and insurance companies. The quantity of money is consequently endogenous. An important part of the dissertation contains an analysis of the effects of different regulations of credit.