It's also important to consider the type of company and the type of work done: A single person or small team doing contracting work will have a different (likel

It's also important to consider the type of company and the type of work done: A single person or small team doing contracting work will have a different (likely smaller) overhead than larger companies. OTOH having more people allows for a wider array of capabilities, or being able to tackle larger projects, or develop internal tools for higher efficiency.