I understand what producers do, but I'm not sure about the role of their production companies. When, in a film's credits, it says that something is "a (insert company or person here) production", what does that mean in regards to the production of the film? For example, No Country For Old Men was produced by Scott Rudin, Ethan Coen, and Joel Coen, and is "a Scott Rudin/Mike Zoss production" (Mike Zoss is the production company of Ethan and Joel Coen). However, The Ladykillers was produced by the Coens as well as Tom Jacobson, but is just "a Tom Jacobson production". Why is this? Also, what is the difference between producing and presenting a film? ((insert person or company here) presents a (insert person or company here) production). Also, some films only use "presenting" credits (Walt Disney Pictures and Jerry Bruckheimer Films present Pirates of The Caribbean: Curse of the Black Pearl).