The Hunger Games is World Systems Theory structuralist.
Center= capital (also see district 13)
Periphery = outer districts
Semi-periphery= the close in districts that supply soldiers and tech
And without putting in too many spoilers, I have to say I loved the last book especially for its bold faced critique of imperialist regime change. I know there are others who hated it. But fuck 'em. Collins managed to put some complicated political machinations into a book for teenagers.
I can't wait for this fucking movie to come out.