5 - Angrist Lecture Notes

5 - Angrist Lecture Notes - Angrist et al. on KIPP Lynn...

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Angrist et al. on KIPP Lynn (MA) KIPP schools are aimed at low-income students; KIPPs have strict discipline, encourage student work ethic The KIPP students perform at better-than-average levels, but why ? Does KIPP simply attract the better students in the first place? Or does KIPP actually make students better? Research strategy : exploit the fact that, during 2005-2008, KIPP applications were “oversubscribed ” – so many kids wanted to go to a KIPP that the state had to hold a lottery to determine who would actually be allowed to attend the KIPP.
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Being a “lottery winner” is a random variable , so it can’t be correlated with unobservable characteristics (= the error term e) such as motivation, IQ, or anything else that we can’t explicitly measure – but, being a winner is certainly correlated with attending a KIPP (X)! In other words, the lottery gives us the equivalent of a random experiment: winners = experimentals, losers = controls. So, being a lottery winner is correlated with attending a KIPP, but
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This note was uploaded on 09/29/2011 for the course ECON 364 taught by Professor Killingsworth during the Fall '11 term at Rutgers.

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5 - Angrist Lecture Notes - Angrist et al. on KIPP Lynn...

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