" If you take a phone off a depressed teenager, you get a suicidal teenager. " Do you ? You're giving this as an obvious fact, however it really is not. Maybe

" If you take a phone off a depressed teenager, you get a suicidal teenager. " Do you ? You're giving this as an obvious fact, however it really is not. Maybe it's true, but it goes against what happens for young adults, or against : "This paper investigates the extent to which social media are harmful for teenagers, leveraging rich administrative data from the Canadian province of British Columbia and quasi-experimental variation related to the introduction of wireless internet there. I show neighbourhoods covered by highspeed wireless internet have significantly higher social media use, based on Google search volume data…I link spatial data on broadband coverage to 20 years of student records that provide detailed information about individual student health. Using this novel data linkage, I estimate a triple-difference model comparing teen girls to teen boys in terms of school-reported mental health diagnoses, before and after visual social media emerged, and across neighbourhoods with and without access to high-speed wireless internet. Estimates indicate high-speed wireless internet significantly increased teen girls’ severe mental health conditions – by 90% – relative to teen boys’ over the period when visual social media became dominant in teenage internet use. I find similar effects across all subgroups. When applying the same strategy, I find null impacts for placebo health conditions – ones for which there is no clear channel for social media to operate."