Second-born children are more likely to misbehave - and it's mostly to do with how their parents bring them up.
The MIT Sloan School report has shown second-born children are 25 to 40 per cent more likely to get in major trouble in school and even with the law.
MIT economist and report author Joseph Doyle, claims second-born kids are more likely to be rebellious.
The expert believes this is strongly related to how strict parents are with their first born and how they tend to go easy in comparison on their second-born.
Mr Doyle told NPR: “The firstborn has role models, who are adults.
"And the second, later-born children have role models who are slightly irrational two-year-olds, you know, their older siblings.
"Both the parental investments are different, and the sibling influences probably contribute to these differences we see in the labor market and what we find in delinquency."
He continued: "It's just very difficult to separate those two things because they happen at the same time.”
This information will undoubtedly divide opinion among families!
