What is the typical financial arrangement between major television networks and their affiliates?

I know that networks pay production companies for the right to broadcast their shows, and I know that networks ultimately make their money via the sale of advertising. My question is, do networks sell advertising and then pay individual stations to broadcast their shows (with their ads), or do individual stations sell advertisements and then pay networks for their editorial content? Or do networks and affiliates have some other financial arrangement?|||you can contact any local station and ask to see this information. They are obligated under the FCC rules to disclose all sources of income for their station. The same goes for radio stations. Most have it in a packet for the public to look at. I hope this heps.