Your contribution is very interesting : it shows how little a diploma (a.k.a. "education") has to do with any kind of ability to produce anything useful.

http://oxrep.oxfordjournals.org/content/32/4/475.abstract

http://oxrep.oxfordjournals.org/content/32/4/538.abstract

http://ner.sagepub.com/content/224/1/R29.abstract

https://newrepublic.com/article/124943/america-overeducation...

http://www.sciencedirect.com/science/article/pii/03043932949...

https://www.hks.harvard.edu/fs/lpritch/Education%20-%20docs/...

http://repec.iza.org/dp5401.pdf

http://www.kcl.ac.uk/ioppn/news/records/2013/December/Differ...

http://www.sciencedirect.com/science/article/pii/S0160289605...

https://papers.ssrn.com/sol3/papers.cfm?abstract_id=2862754

http://www.forbes.com/sites/ccap/2016/11/01/are-we-still-goi...

https://www.insidehighered.com/news/2011/01/18/study_finds_l...

https://www.amazon.com/Academically-Adrift-Limited-Learning-...

http://www.opencolleges.edu.au/informed/features/21-myths-th...

http://www.forbes.com/sites/realspin/2013/05/06/federal-stud...

http://longevity3.stanford.edu/blog/2014/10/15/the-consensus...

http://www.forbes.com/sites/ccap/2016/11/01/are-we-still-goi...

https://www.bloomberg.com/view/articles/2012-12-31/research-...

http://economics.mit.edu/files/10414

http://www.sciencedirect.com/science/article/pii/S0040162505...

http://www.nber.org/papers/w18315

http://www.nber.org/papers/w19895

http://www.nytimes.com/2015/03/12/upshot/how-to-improve-grad...

http://hechingerreport.org/how-often-do-community-college-st...

https://nces.ed.gov/fastfacts/display.asp?id=40

http://spectrum.ieee.org/at-work/education/the-stem-crisis-i...

http://www.forbes.com/sites/susanadams/2013/05/28/half-of-co...