the bigger question is "productive for what?". POP argues that traditionally police were productive in handing out tickets and making arrests. However, these tactics did not ensure crime decreased. In fact, numerous criminological studies showed they made no impact whatsoever on the greater sense of public safety as first reported in the famous study by George Kelling and others (The Kansas City Preventive Patrol Experiment, Police Foundation, 1974). POP creates specific goals in tackling tangible problems. Productivity is determined by resolving problems. If tickets and arrests help do that, they are employed. If they don't help that, then other more creative strategies are employed. Consequently, the actual reason tension and resentment arises is because officers are ill-trained in creative problem-solving and feel they do not get adequate supervision or time to do POP. Contrary to the tension and resentment issue in some agencies, in other more successful agencies, proper implementation of POP is established so that sophisticated problem-solving is part of the promotional process and officers come to see involvement in POP as a career path to more advanced ranks. Abuse of authority or heightened conservatism Increased discretion creates a risk for abuses of authority. POP encourages police to actively intervene in situations they had previously left alone, which presents more opportunities for abuse and a “net-widening” effect.. The POP projects published to date (over 700 are listed in the POP library at www.popcenter.org) suggest that in most cases officers collaborate with community members in selecting proper levels of discretion and choose problems they, and the public, want resolved. Although there is no evidence to suggest it is actually happening, there is a possibility that increased discretion coupled with the possibility of larger social consequences could make officers more conservative in their approach; perhaps too conservative to fully achieve POP goals. In summary, POP represents one of the more lasting and successful components of the community policing movement. It has stood the test of time thus far and delivered a plethora of successful projects in resolving community crime and disorder. Michael Scott's 20-year retrospective concludes: "After 20 years, problem-oriented policing has demonstrated an internal logic that has been successfully applied at the project level, and remains a promising approach for the foreseeable future." (Michael Scott, Problem Oriented Policing: Reflections on the First 20 Years, U.S. Department of Justice, Washington, 2000. page 129). Evaluations The Center For Evidence-Based Crime Policy in