Earlier quoted context omitted.
It's very strange given how necessary air travel is. It still surprises me how need and margins are inversely related (luxury goods have high margins, commodities low), but it makes sense. It's the price. The price of travel is so high for most consumers that they're going to optimize on price at the sacrifice of everything else. The cost of flying and operating an airline is so expensive that airlines also optimize…
Food is also necessary, but the margins on staple foods are razor thin. It's Econ 101: profits in competitive industries tend towards zero. The only way to make consistent economic profits is to focus on industries where there is (relatively) little competition. One way to do that is ride the wave of a new industry before the competitors have time to pile in. Another is to enter industries where product differentiati…
You can also use branding-slash-marketing to make your fungible product seem less fungible. Witness, for instance, how cattle ranchers used marketing campaigns to turn "Angus beef" into a premium, name-brand product (http://bbq.about.com/od/beef/a/Angus-Beef.htm) that customers don't believe is directly substitutable with unbranded beef.