Gun violence in the city dropped by nearly 16% in April. That is compared with a 13% drop for the nation as a whole.
The independent policy group Center for American Progress compiled the information.
The researchers noted a four-month sample can be a strong predictor of a final, single-year trend.
The findings about Philadelphia reflect an FBI analysis which was released this week as well.
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The bureau found violent crime in the U.S. dropped 15% from January to March when compared to the same time last year.
The data comes from 72% of the nation's law enforcement agencies, which voluntarily submitted numbers.
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