Nice interview of Prof Joshua Angrist of MIT:
As a teenager growing up in Pittsburgh, Joshua Angrist became fed up with high school and said his goodbyes to it after his junior year. Today, at the Massachusetts Institute of Technology, he’s a top researcher in labor economics and the economics of education — with work that includes a series of famed studies of policy choices for K-12 schooling.
Much of his work has been based on ingenious “natural experiments,” that is, episodes in which two or more groups of people were randomly exposed to different policies or different experiences. Such occurrences are an opportunity for Angrist and his co-authors to use the tools of econometrics to assess the effects of those differences — whether that’s a large classroom versus a small classroom or education at a charter school versus education at a conventional public school.
Angrist’s first natural experiment looked at…
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Utopia, you are standing in it! 
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