does Fedex fly its own airplanes full of packages? Is there somebody else flying airplanes full of packages to service both Fedex, UPS and whatever other private mail carriers? Or do they just ship them in the regular passenger liners that we all use to fly on vacation?
Which naturally segues to the question, is it possible to start your own “mini-Fedex” shipping company and get somebody else do the actual air shipping for comparably cheap rate? Indeed, why hasn’t anybody done so, i.e. what are the major barriers to entry that make sure that Fedex and UPS appear to constitute an oligopoly without smaller niche competitors?