If you and your siblings have been trying to settle a squabble over who is the most troublesome then you might just have come to the right place.
If you’ve ever heard of second child syndrome then you’ll know that it centres around the second, or middle child, not having a clear role in the family, leaving them feeling left out.
And now, a new study has found that birth order does in fact effect how we behave, and makes the second child the most troublesome as a result.
Research carried out by MIT economist Joseph Doyle and his team has brought some interesting second child theories to light.
Read more on ok.co.uk