Problem-oriented policing in violent crime places: A randomized controlled experiment

Over the past decade, problem-oriented policing has become a central strategy for policing. In a number of studies, problem-oriented policing has been found to be effective in reducing crime and disorder. However, very little is known about the value of problem-oriented interventions in controlling violent street crime. The National Academy of Sciences' Panel on the Understanding and Control of Violent Behavior suggests that sustained research on problem-oriented policing initiatives that modify places, routine activities, and situations that promote violence could contribute much to the understanding and control of violence. This study evaluates the effects of problem-oriented policing interventions on urban violent crime problems in Jersey City, New Jersey. Twenty-four high-activity, violent crime places were matched into 12 pairs and one member of each pair was allocated to treatment conditions in a randomized block field experiment. The results of the impact evaluation support the growing body of research that asserts focused police efforts can reduce crime and disorder at problem places without causing crime problems to displace to surrounding areas

Growth Rates of Infants Randomized to Continuous Positive Airway Pressure or Intubation After Extremely Preterm Birth.

Objective To evaluate the effects of early treatment with continuous positive airway pressure (CPAP) on nutritional intake and in-hospital growth rates of extremely preterm (EPT) infants. Study design EPT infants (240/7-276/7 weeks of gestation) enrolled in the Surfactant Positive Airway Pressure and Pulse Oximetry Trial (SUPPORT) were included. EPT infants who died before 36 weeks of postmenstrual age (PMA) were excluded. The growth rates from birth to 36 weeks of PMA and follow-up outcomes at 18-22 months corrected age of EPT infants randomized at birth to either early CPAP (intervention group) or early intubation for surfactant administration (control group) were analyzed. Results Growth data were analyzed for 810 of 1316 infants enrolled in SUPPORT (414 in the intervention group, 396 in the control group). The median gestational age was 26 weeks, and the mean birth weight was 839 g. Baseline characteristics, total nutritional intake, and in-hospital comorbidities were not significantly different between the 2 groups. In a regression model, growth rates between birth and 36 weeks of PMA, as well as growth rates during multiple intervals from birth to day 7, days 7-14, days 14-21, days 21-28, day 28 to 32 weeks PMA, and 32-36 weeks PMA did not differ between treatment groups. Independent of treatment group, higher growth rates from day 21 to day 28 were associated with a lower risk of having a Bayley-III cognitive score Conclusions EPT infants randomized to early CPAP did not have higher in-hospital growth rates than infants randomized to early intubation