I have a pretty good article floating around my drive on police work as an "art" versus a "science". (I'll see if i can dig it up, but I'm still way behind on organization)
Essentially, the point was that there can be a mutual distrust between academia and LE professionals. Some academics look down on LEO's and don't trust field experience/department culturization, while street cops can have a distrust in "eggheads", whose ideas can run from unfeasible to purely destructive (see Cloward-Piven).
That isn't to say everyone in those respective fields feels that way, but the author felt there were enough people on both sided to make departments resistant to change led by academia.
If you also take into account organizational biases, it would be easy to say that any organization will be resistant to change.
One thing that would help would be for academics to mitigate any possible damage their research might cause; in the Kansas City Preventative Policing experiment, for example, both the department and the researchers watched for skyrocketing rates of crime, in which case they prepared to abandon the experiment
This comes back to the scarcity of resources issue; by cutting back the number of hours used in preventative patrolling, departments can target resources more efficiently, so I agree with you, this was definitely a success.
The more data you have, the more accurate your statistics are going to be (side note - I was surprised to find out how well the bell curve represented reality in my statistics class). By extending the time the experiment ran, the researchers were able to gather more data.
In addition, in covering a year, the experiment was also able to take into account seasonal variations (in summer, you'll have more unsupervised vagrants and more juveniles will be out and about)
oops, please swap vagrants and juveniles in the above!
[Withheld] brought up the targeting of "hot spots" earlier; this would be the best way to start allocation of resources. "In Minneapolis, for instance, only 3 percent of the city’s addresses accounted for 50 percent of calls for service to the police" (Braga, 2008, p.6)
The tactics of how to apply the resources is a another matter of discussion. Do you use surveillance teams, station additional reactive teams in the area, or take another tact?
Braga, A. (2008).Crime Prevention Research Review No.2: Police Enforcement Strategies to Prevent Crime in Hot Spot Areas. Washington, D.C.: U.S. Department of Justice Office of Community Oriented Policing Services,. Retrieved July 12, 2014 from