Samo Burja Retweeted gwern
The history of official metrics illustrated by example.https://twitter.com/gwern/status/1017610919260639232 …
Samo Burja added,
gwern @gwern
TIL: 'social impact bonds' weren't invented in 1988, they were invented in the 1960s as 'performance contracting'; but bombed so badly in the 1972 OEO 18-school quasiexperiment of n=24,000 students that they went down the education research memory hole: https://www.dropbox.com/s/84iu3g4p46qwv9l/1972-page.pdf …
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1:16 AM - 13 Jul 2018
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