If you're not firstborn, this study might make you mad

If you're not firstborn, this study might make you mad

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If you're not firstborn, this study might make you mad

Photo: Getty Images

Photo: Getty Images

According to a study published in the Journal of Human Resources, firstborn children may be smarter than their younger siblings.

The results are based on IQ tests and say that oldest children may have better thinking skills.

Read about the whole study and how it was conducted.

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