Community policing is an example of non-exclusion and co-consumption. All residents in the community receive the benefits of community policing without reducing the benefits to others (Feiock, RC, p. 8). The covenant or contract is established by police departments and municipal administrators with the responsibility or promise to protect and serve the community. Generally, a good or service is non-exclusive when it is impossible or impractical to exclude other people from consuming the service (Feiock, RC, p. 9). An agent's behavior inconsistent with the wishes or expectations of the principal in a principal agent relationship becomes the transaction cost for the constituents. Transaction cost hinders specification, monitoring and application within communities and does not meet citizens' expectations. In this case, it remains plausible to subcontract such services to the private sector; however, the failure to implement the policy makes it difficult to continue this approach. Some policy categories involve considerable monitoring and measurement costs that make contracting with private agents