"The authors postulate that such children might be more competitive in the classroom, leading to better grades. They might be more demanding as adults; when locked in salary negotiations, they may be the ones who demand more. They may be more willing to fight for their own financial interests, even at the risk of annoying friends and colleagues. The authors can't rule out a more negative reason-- these young rule breakers might be doing something unethical as adults to increase their grown-up salaries," says the article, which also offers a few tells that your kid is strong-willed (but I'm betting you'll know if you've got one).