Organized crimes (Mob/Mafia) are monopolistic. They refrain from small illegal activities, petty thefts etc. because it does not benefit them. As a result, there are less crimes in areas controlled by the mob then areas where There are more independent and small town criminals. Using economic terms such as marginal benefit marginal cost why was economically rational for crime leaders to assassinate Dutch Schultz in 1935 and not thomas E.Dewey