I expect someone may comment and ask what this has to do with Hacker News, but I submitted it because of a couple of very interesting things I noticed. First, I've always heard how people used to have a sense of loyalty to their company, and (probably) vice versa. It seems that companies with the lowest turn-over have much older employees. Of course, you can't have 20-year old employees without them being about 40, so I'm sure that messes with my perception of the statistics. Second, pay is obviously not correlated with tenure very strongly. Probably a lot more to do with how much people like the job and the company. Nothing terribly surprising, but still interesting, I thought.