There was a recent discussion in the econoblogosphere that provides statistical evidence to back up jsankey's argument: Initial post: http://gregmankiw.blogspo

There was a recent discussion in the econoblogosphere that provides statistical evidence to back up jsankey's argument: Initial post: http://gregmankiw.blogspot.com/2009/08/least-surprising-correlation-of-all.html http://gregmankiw.blogspot.com/2009/08/least-surprising-corr... Response: http://krugman.blogs.nytimes.com/2009/08/28/heredity-environment-justice/ http://krugman.blogs.nytimes.com/2009/08/28/heredity-environ... Conclusion: http://gregmankiw.blogspot.com/2009/08/test-scores-and-income.html http://gregmankiw.blogspot.com/2009/08/test-scores-and-incom... The summary is that for both adopted children and non-adopted children, the higher the father's income, the higher the resulting test scores. Hence, money makes you smarter.