This "study" still looks fishy to me. It's not a study but a kind survey about what "experts" think about other existing studies. There might be a huge politic

This "study" still looks fishy to me. It's not a study but a kind survey about what "experts" think about other existing studies. There might be a huge political bias in the experts opinion that might be motivated to push an agenda. Also it might be tempting for them to shout for the wolf as it will make them appear like "savior" of kids and "acting to change the world" instead of just saying "nothing to see there". My personal opinion is that all their results are circumstantial and might easily be a huge case of cause and correlation being mixed up. For example, in many countries educated people are reluctant to make kids. Is it due to depression due to smartphone/social network or that the world currently is fucked up and going worse day after day? Sure, in 1984 kind of countries like north Korea or China where information is tightly controlled to only be positive, people might look to be less depressed, but then it is the story of "Brave new world"...