New research shows how cities across America work might be able to target their efforts and police attention.
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The result: a detailed map of violent crime "hot spots", and a better understanding of factors that create the right climate for violence. Both could help a city's leaders and police focus resources on the areas where they can do the most good.
The findings, made using funding from the National Institutes of Health, are published online in the American Journal of Public Health.
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In fact, they are currently preparing the same analysis for the city of Flint, Mich., which unlike Boston has some of the nation's highest violent crime rates. Victims of that violence often end up in a hospital emergency room staffed by U-M doctors.
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Lipton, who describes himself as a geographical epidemiologist, and several of his co-authors are members of the U-M Injury Center, which has federal funding to study and test ways to reduce injuries of all kinds.
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Details from state liquor board licenses, police records and the U.S. Census Bureau all factored into the analysis. Over time, other types of data could be added – so that researchers and police can see the impact of any factor that might contribute to violent behavior.
The goal: to help policy makers and police identify areas that have higher rates of risk factors that may combine to produce violence.
The density of liquor stores or alcohol-serving bars and restaurants alone isn't enough to explain violence patterns – the new paper shows that it's much more complex than that.
"Why are two areas of a city, which seem to be the same across typical demographic factors, different in their level of violence? We need to become more nuanced in understanding these relationships," says Lipton, who is also a member of the Prevention Research Center at the U-M School of Public Health.
The new research, begun when Lipton was at Beth Israel Deaconess Hospital in Boston, involved Anthony Braga, a Harvard University criminologist who is chief policy advisor to the Boston police commissioner, and Massachusetts Institute of Technology economist Xiaowen Yang. Co-authors also include U-M statistician Jason Goldstick, Ph.D., U-M emergency medicine doctor Manya Newton, M.D., MPH, and Injury Center research analyst Melissa Rura, Ph.D.
The analysis of Boston data may help local authorities – while also helping the U-M researchers test their models and theories. Even with Boston's relatively low violent crime rate, the researchers found they could show how place-based factors influence crime rates.
The study examined 2006 data on homicides and aggravated assault incidents, drug arrests and 911 citizen emergency calls from the Boston Police Department along with 2000 U.S. census data and 2009 alcohol outlet data from the Massachusetts Alcohol Beverage Control Commission.
Results from the study indicate that types and densities of alcohol outlets were directly related to violent crimes despite the fact that alcohol outlets are typically viewed as locations in which other population or environmental factors, such as poverty or prostitution, relate to the violence.
The study also shows that drug possession, rather than drug distribution, has a positive relationship with violent crimes. Features of adjacent areas, and activities occurring there, were also found to be significantly related to violent crime in any given "target" area.
Source-Eurekalert
