Study: Second-born kids more likely to become criminals

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(CBS) -- A new study published by MIT economist Joseph Doyle in January found that second-born sons are more likely to be suspended from school, become juvenile delinquents and go to prison.

The study's authors found that second-born children, particularly second-born sons, have a 25 to 40 percent increased chance of being troublemakers at school or with police as compared to first-born children in the same family.

The researchers examined thousands of family data records of brothers from Florida and Denmark.

Doyle said second-born sons could be more prone to trouble-making than older children in the family because parents are often more invested in first-born children's upbringing. He suggested that parents can be less vigilant once they have second and subsequent children.

According to the study, treating children differently who were born later than other siblings could impact long-term behavioral development.