The interaction between culture and pubertal timing in predicting girls’ problem behavior in Sweden (red line) and Slovakia (blue line): Notice that in sexually-permissive Sweden, being early has a huge impact on a girl’s risk of getting into trouble (with drugs, ignoring curfews, being truant at school, and so on); but a girl’s puberty timetable makes far less difference if that child lives in Slovakia.

Data from: Skoog and others, 2013.