The figures (70% for second generation, 90% for third generation) has been reported by media article after media article over the last decade (at least). I see

The figures (70% for second generation, 90% for third generation) has been reported by media article after media article over the last decade (at least). I see them all the time. Some articles attribute the source to the Williams Group Wealth Consultancy. Of course, they are selling their wealth management services so they have an incentive to "juice" the numbers by leading questions and nonrandom samples. I've never seen the actual "study" so their methodology can't be subject to scrutiny. I suspect it's an informal survey of a specific population. Financial articles in general tend to be extremely low effort and low quality. I wouldn't attribute anything more than shitty writing, which is basically 90% of financial articles.