Claiming that this is survivorship bias is off the mark. That is not a criticism that you can level at any long-term study just because you heard it on the inte

Claiming that this is survivorship bias is off the mark. That is not a criticism that you can level at any long-term study just because you heard it on the internet. If the intent of the study is to evaluate what terms lead to survivorship, then of course your study is going to be full of survivors - as this one is. While the assessment undoubtedly suffers from some bias, that is also the intent, to some degree. It does not seek to say that these are the only reasons people became millionaires, but instead that these were common, correlated behaviors, and that the logical conclusion you might draw from them is that they are also causative.