The theory gets support from U.S. census data for 153 cities, which show an indirect link between low sex ratios and violent crime.
The theory gets support from U.S. census data for 153 cities, which show an indirect link between low sex ratios and violent crime.
来自美国153个城市的统计调查资料支持了这个理论，显示在低性别比例与暴力罪行间具有间接的关联。