Some countries have also developed market-type mechanisms for use within the public sector. These are devices which, in one way or another, oblige public sector organizations to compete with one another. The provider-purchaser model is based on the separation of the provider and the purchaser from each other. The purchaser is mostly responsible for the supervision and coordination of the service and the provider is responsible for the production and quality of the given service. (e.g. Salminen & Viinamäki 2001: 22.) Some of the biggest cities in Finland have introduced the provider-purchaser model to reorganize the administration and service production within their own organization. The central idea is that both sides (the provider and the purchaser) can focus on their key competency areas