My sister is going to eat this up

The plight of the older sibling: First-born kids really do have it tougher, new research finds

While I agree with the most of the study, I have to disagree with the following points (based solely on my own experiences):
• That stricter parenting style often shapes the first-born kid into a play-by-the rules perfectionist.
• Younger siblings are more likely to take more risks than the oldest kid in the family.