The kansas city experiment 1972-1973 (12 ene 1972 año – 26 dic 1978 año)

Descripción:

divided the southern part pf kansas city into 15 areas , five of the "beats "were patrolled as usual,in another group the beats patrol activities and in the third they recived a novel treatment.the program was kept a secret and citizens were unaware of the difference between patrolled and unpatrolled parts of the city.

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