Score contribution per author:
α: calibrated so average coauthorship-adjusted count equals average raw count
This paper extends the Diamond and Dybvig (1983) model to compare two banking economies: one with a competitive banking system and another with a monopolistic one. It is shown that a competitive banking system is more fragile than a monopolistic one in the sense that the parameter set stipulating that a bank run equilibrium exists in the competitive banking system dominates the set in the monopolistic one.