Labour Economics of Sports

Hi,

I have to do an essay (approx 5000-6000 words)on the Labour economics of sports.  Currently I'm in the middle of finding books and reading them, but I'd like to get a bit of an overview/head start on the research process.

In short, What should I be writing about?
What should I be looking for?
What Subtopics/Issues should I be writing about in this essay?
TV rights? Free Agency? Collective Bargaining Agreements? Player Strikes? Lockouts? Salary Caps? Sports Agents?  I know I'm missing a lot of topics, also how would I order the topics to make it flow?

(I have no prior knowledge in this field, I am familliar with NFL football though)

Thanks!