User Experience Careers. How to Become a UX Pro, and How to Hire One, interesting (and free !!) report from S. Farrel & J. Nielsen. It analyzes how UX pros educated and trained themselves for their careers.
In 2013 they surveyed 963 people working in the UX field to find out what they do at work, what is most useful to know, and which kinds of people thrive in UX research, interaction design, and information architecture.