> I clearly stated that it's a hypothesis. Yes, after someone explicitly asked you to back up your initial statement. > The biggest assumption, that immigrant

> I clearly stated that it's a hypothesis. Yes, after someone explicitly asked you to back up your initial statement. > The biggest assumption, that immigrants are less risk-averse, sounds very plausible to me. And that's my point. All you need to talk about hereditary traits in these contexts is some vague notion of what seems plausible and believable, and not any actual data. And yet, people are probably going to find it more believable because genetics are involved than someone who explicitly bases it on some purely sociological theory, because genes sound more tangible than sociological theory and the statistics based on that. It's not that there is anything wrong with making up theories. But by stating that it has to do with genes - without any initial disclaimer that it is just a theory - makes it sound like it is based on data and not just a theory.