When I was investing in public companies, this metric was one I used to decide where to put my money. I think it is many times companies settle for hiring as many people as possible to get their profit margins slim. This MO produces companies with a lot of fat who need to lay off employees when the inevitable down turn arrives. They often times over promise and under deliver.<p>Most public companies I researched had revenue/employee between $100,000 and $200,000. This simply isn't high enough to provide any cushion.<p>The reason here, that Craigslist is at the top, is because they outsource information management to the community through flagging and karma assignments. Most of the work of the employees is handling the exceptions to the algorithms, which usually result in the form of an email to craig or a post to the feedback or help topics. These may result in a kind email from craig or banning of a spammy account.<p>They are so good, they already have phone based account validation. None of the other companies on this list have that. CL focuses their employee time and energy on what is important -- stuff only humans can do. The rest is done by computers and this is a brilliant sign that they are doing it right.<p>Most companies handle exceptions with bureaucracy, filling up revenue with salaries until the boat sinks.