It's easy enough to fix for screening for gender, but it's much harder to fix the screening for age, because people like to see a sequence of activities. At the very least, work experience years comes across. When people leave off graduation dates, that throws up a red flag too.
The harder part is how do you turn off the bias once the interviews start?
This was an issue with many orchestras - they ultimately made the auditions physically blind. http://www.uh.edu/~adkugler/Goldin&Rouse.pdf
