I'm guessing a study would show: kids who are put on punishment for bad behavior are less likely to end up behind bars. That's because thinking twice is the kind of learned behavior best embedded in childhood.
I'm also guessing a study would show: kids who have chores are more likely to have better work habits--as well as better housekeeping habits--as adults. What's more, they make better roommates!
And I bet a study would show: kids who do charity work are more likely to be giving, compassionate adults. And make better spouses!
Need more proof? Check out the Best Reality Show About Raising Kids.