research in the social sciences. The publication of working papers does not imply a transfer of copyright. The authors are fully responsible for the content. The empirical evidence suggests that there is a significant, negative relationship between inflation and economic growth. Conventional monetary growth models, however, predict a significantly smaller growth effect. This paper proposes a monetary growth model with an explicit credit service sector to explain the observed magnitude. Since credit services are assumed costly to produce, the consumers equate the opportunity cost of holding money with the marginal cost of credit. Therefore the technology of the financial sector influences the velocity of money, and consequently, how inflatio...