Although the reasons for the decline in teen violence aren't clear, Dicker speculated that several factors may be responsible.
"The wealthier the country, the less aggression; stronger families, stronger schools all contribute to that impact; antibullying programs are also having an impact," he said. "There is some hope that what we have been doing has been working."
More information
To find out more about teen violence, visit the U.S. National Library of Medicine.
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