Bibliography (9):

1. Is Individual Job Performance Distributed According to a Power Law? A Review of Methods for Comparing Heavy-Tailed Distributions

2. Impact of valid selection procedures on work-force productivity

3. Staffing 21^st-century Organizations

4. Wikipedia Bibliography:

   1. https://en.wikipedia.org/wiki/Utility_gain  :

      https://en.wikipedia.org/wiki/Utility_gain

   2. https://en.wikipedia.org/wiki/Financial_adviser  :

      https://en.wikipedia.org/wiki/Financial_adviser

   3. https://en.wikipedia.org/wiki/Physician  :

      https://en.wikipedia.org/wiki/Physician

   4. https://en.wikipedia.org/wiki/Programmer  :

      https://en.wikipedia.org/wiki/Programmer

   5. Power law

   6. Normal distribution