A simple agent-based model of business units lending money to one another is sufficient to understand on what conditions avalanches of bankruptcies may arise. The model highlights the consequences of specialisation into money lending as well as the impact of preferential lending relations.

Some empirical investigations are pointing to the fact that high-tech firms are subject to credit rationing to a higher extent than the average. This excess of credit rationing may not be due to information asymmetries, but rather to the inability of credit institutions to screen projects in...