People have been pointing out problems long before Levitt; pretty much since publication. What was new in 2018 were the allegations of outright fabrication of e

People have been pointing out problems long before Levitt; pretty much since publication. What was new in 2018 were the allegations of outright fabrication of evidence (although those weren't entirely new either IIRC, but the evidence for the allegations was), and in general people have become a bit more willing to call "Scientific Studies" out on their bullshit, rather than "it's a scientific paper, so it must be truth".