Of particular interest in the model is the identification of a point in time at which a low level of cleared crimes will jeopardize the criminal justice system's functioning. The model divides police forces into seven groups that range from metropolitan to rural police departments. Prognoses based on the model are made for crime clearance rates, and the authors believe that the police force in Stockholm will reach its critical point at the beginning of the 21st Century. In general, this critical point will come much later in rural police forces. Unless current trends change, the authors conclude that a growing proportion of crimes reported to the police will not be cleared due to lack of resources. 31 references, 2 tables, and 5 figures