A massive new study of thousands of kids says this one experience gives them a very big advantage

I admit: I’ve spent a lot of time since becoming a parent trying to figure out what cutting-edge research and science have to say about raising successful kids. I also admit that my wife and I have tried to put the fruits of that research to work. Example 1: Move to the best neighborhood you can afford, even if it means you have the smallest house on the block. Check. Example 2: Embrace the “run to their side” mode of parenting versus the “let them figure it all out on their own” model. C...