I already cited David Card you moron 
Bahahaha! Dude, you're the one who doesn't know the first thing that they are talking about, but are beyond arrogant thinking that they discovered something that no other economist has.
You're the fucking definition of Dunning Kruger 
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Dude, literally go read any fucking studdy on this. I could just link you the Google Scholar search results as evidence if you want. This is beyond absurd
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