> The next question is whether it's worth doing a PhD for the 2/3 people who don't work in Academia. Perhaps it is. I think this actually depends on your field

> The next question is whether it's worth doing a PhD for the 2/3 people who don't work in Academia. Perhaps it is. I think this actually depends on your field. Basically, it's a matter of running the numbers - if the difference between the increase in income and the cost of grad school for you (both loss of income and the effort required) is significantly greater than 0 - go for it.