What about controlling for common cause hypothesis? That urbanization is linked to both more specialization to support more mental health outpatient capacity an

What about controlling for common cause hypothesis? That urbanization is linked to both more specialization to support more mental health outpatient capacity and better diagnosis? Let alone in the case of it being harder to hide and more obvious if someone starts having a psychotic episode in the middle of a city street vs on his own twelve acres. The examples of China aren't that great for it. A drop in visits after pollution declined in a city would dodge many of the variables in question - if it was already urbanized and specialized then it would drop more. I may be unduly cynical about the Ivy Leagues but I suspect those examples were 'clickbait' chosen for provocativeness over soundness. That isn't to say that there is never a link between pollution and negative mental health outcomes. It is abundantly clear that lead poisoning is linked to dumb aggression and crime for instance.