The Marginal Revolution blog led me to Jon Millward's page. Jon Millward is a sort of 'Ideas Detective', in his own words. Every now and then he comes up with a probing analysis of something 'new', like the last words of death row prisoners or call girl reviews.
His latest study makes a deep analysis of Porn star demographics. This is probably the largest study of porn stars ever undertaken, including age, race, hair color, birthplaces, film categories etc. It’s based on a massive data set of 10,000 porn stars extracted from the Internet Adult Film Database.