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I would not have guessed the gap was so large. Part of it is easy to understand — everyone needs health care but education tends to be limited to certain stages of life. But that only gets you to a 20–1 or so ratio. 

Questions that are rarely asked

It is estimated that less than $1B is spent in the U.S. each year on education research, with the federal government spending about $700M and universities, foundations and the private sector spending …