The introduction of competition has frequently been found to cause costs to fall. There has, however, been a question whether this was partly achieved at the cost of quality. Auction theory predicts prices would fall the greater the competition to provide the service. There has been some debate, however, whether the smaller budgets would make contract compliance more difficult. Evidence is found in support of this hypothesis. We also find some evidence that the better recorded performance of the in-house DSOs during this period was due to the information advantage they had from being incumbents.JEL classification: H57, L14, L15, L32 and L33.