[wolframhempel]

I feel this is missing some industries with smaller company sizes and extreme employee to revenue ratios, e.g. Hedgefunds, High-end Legal Practices etc. Even more so as these may have the ability to avoid support-functions (HR, Mid Level Management etc.) that don't directly add to the bottom line.

[grigjd3]

Well, it is companies listed on the S&P 500 so privately held companies aren't included.