I find the re-naming of this post quite weird. The original title "A patient without cavities visits 180 dentists" was informative, and made me click. The paper is about that exact thing, and I enjoyed it.
On the other hand, I have no idea what "Health Services as Credence Goods: a Field Experiment" means. With this title, I would definitely not have clicked the link. I know it is the title of the paper, but given that HN is not an academic journal, it should be allowed to give more informative titles to posts than the original content.
Unfortunately scientific paper titles are extremely uninformative, so HN's policy on using the original title (unless it's clickbait) is counter-productive. :|
On the other hand, I have no idea what "Health Services as Credence Goods: a Field Experiment" means. With this title, I would definitely not have clicked the link. I know it is the title of the paper, but given that HN is not an academic journal, it should be allowed to give more informative titles to posts than the original content.