4 ms·I wonder if this is true in China and Japan as well.by awt 10y agoI wonder if this is true in China and Japan as well.xapata 10y agoFair point. It's plausible that the act of immigration selects for more motivated people.empath75 10y agoWhat alternative explanation would their be?xapata 10y agoWell, there's always the cultural one. Personally, I think attributing the cause to culture is sloppy research.