In a study of US cities in the state of Ohio, Nicholas Zill, for the Institute for Family Studies, found violent crime rates lower in areas where two-parent households were the norm.
For instance, Springfield and Cleveland, where less than half of mothers were married, reported violent crime rates of 1,298 and 1,895 incidents per 100,000 residents, respectively.
In contrast, Cleveland Heights, where 63% of mothers were married, reported just 267 incidents, and New Albany, with a staggering 91% of mothers married, had only 99 incidents.
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