> Erm, no, self-selection bias never disappears or even attenuates with sample size, the best you can hope for is to reweight the sample according to known demo

> Erm, no, self-selection bias never disappears or even attenuates with sample size, the best you can hope for is to reweight the sample according to known demographics of your target population, Which, to be fair, is literally Neilsen's entire product (for TV at least). I mean, I guess that everyone here understands selection bias at a deep level, but to think that people who sell representative data to big corporations (and have done for longer than many of us have been alive) don't have a similar level of understanding is just weird.