The Sibling Effect: Why Order Matters

Raising more than one kid can be a handful -- as any mom who has ever tried to put one child in time out while seeing if the other needs stitches can tell you. But choosing to have more than one means you're also helping your kids form one of the longest and most important relationships they'll ever know. And it's a bond that affects who they are from the start, according to Jeffrey Kluger, author of the new book The Sibling Effect: What the Bonds Among Brothers and Sisters Reveal About Us. Here's how birth order matters.