The second-born kids are troublemakers

The elder siblings who take pride in being considered responsible by their parents have another feather added to their hat.
According to a report by Joseph Doyle, an MIT economist, the "curse of the second-born child" might be true and second-borns (particularly boys) are inclined to be more rebellious than their older siblings.
The data was collected from thousands of sets of brothers in both the U.S.and Europe, and concluded that the younger ones have a whopping 25 per cent to 40 per cent increased chances of getting in serious trouble at school or with the law when compared to the first-born in the same family.
And what is the possible reason behind it? Doyle suggests that parents invest more time and attention for their first kid, and are generally less vigilant for the younger one. He explained to NPR, "The first born has role models, who are adults. And the second-born children have role models who are slightly irrational 2-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. It’s just very difficult to separate those two things because they happen at the same time.”
So, in case you are a second child and your parents blame you for being a mischievous kid, you now have a logical reason to your defence.