A 2005 experimental study of 4000 pairs of women's resumes found that "a younger worker (aged 35-45) is 42% more likely than an older worker (age 50-62) to be offered an interview in Massachusetts and 46% more likely to be offered an interview in Florida." (p. 4)
Lahey, J. (2005). Age, women, and hiring: An experimental study (NBER Working Paper No. 11435). Washington, DC: National Bureau of Economic Research. Retrieved from http://www.nber.org/papers/w11435
This paper reports on a labor market experiment to determine the hiring conditions for older women, examining the entry-level or close to entry-level labor market options for women ages 35 to 62 in Boston, MA and St. Petersburg, FL. Pairs of resumes were sent to 3996 firms in the two cities to measure age discrimination by employers hiring for entry-level positions.