By Thomas Hawk

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First Children Are Smarter-but Why? - The Atlantic

http://www.theatlantic.com/business/archive/2013/10/first-children-are-smarter-but-why/280725/?single_page=true

Strategic Parenting, Birth Order and School Performance

http://www.nber.org/papers/w19542

Birth Order and Student Performance¡§Summary

http://www.nber.org/digest/mar14/w19542.html

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