If backward time travel is also somehow possible, maybe firms in the
future will choose to outsource some of their operations to the past,
locating their manufacturing and other services in lower-wage time
periods. This opens the possibility of transtemporal gains from
trade… assuming, of course, that governments don’t implement
effective trade barriers.
That is Glen Whitman, here is more, interesting throughout. By the way, Stephen King was right: the movie Jumper is quite good, albeit it requires a taste for conceptual science fiction counterfactuals. It’s the best treatment of teleportation I know, with of course references to Plato’s Ring of Gyges. Catch it on video if you can.