By comparison, Pennsylvania had 1.5 times more black homicides than the national average in 2011 and more than six times the overall homicide-victimization rate nationwide.
In 2011, Pennsylvania had 419 black homicide victims; 378 males and 41 females.
Of the 350 black homicide victims killed with guns, the study shows, 86 percent - or 300 victims - were killed with handguns.
In addition, 37 victims were killed with knives or other cutting instruments, 12 by bodily force and seven by a blunt object. Twenty black homicide victims (5 percent) were below age 18. The average age was 29.
For Pennsylvania homicides in which the victim-to-offender relationship could be identified, 86 percent of black homicide victims (183 out of 214) were killed by someone they knew. Thirty-one victims were killed by strangers.
In the latest rankings, Nebraska tops the list with a rate of 34.43 black homicide victims per 100,000. Missouri, Michigan and Pennsylvania follow.
Chad Dion Lassiter, president of Black Men at Penn School of Social Work and a member of the Philadelphia prisons board of trustees, called the data "alarming."
"We can't be reactive, but proactive," said Lassiter, adding that the study underscores a need for better educational and economic opportunities for all people, including former prisoners.
"Educational apartheid and institutional racism are the recipes for self-destruction, and we need to create an infrastructure that provides adequate counseling and better opportunities for everyone," he said.
But in a country that is consistently ranked higher in homicide rates than nearly all other developed nations, he said, the real solution is to address America's unusual obsession with firearms.
"We need to recognize that we can't have a study on black homicide-victimization rates without recognizing the country's homicide rate in general," Lassiter said.
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