This one really bothers me. The Portland airport mandates all food prices to be the same as at the businesses off-airport locations. As a passenger that makes it really great. As a free-market worshipper I have some concerns about this but it seems to work really well in practice and we get excellent options. Unfortunately, other airports don't rely on free-market competition to result in great offerings either but instead usually have most vendors operated by the same concession company like HMSHost, SSP Group. This gives a captive audience to a quasi-monopolist. It's the easiest situation to avoid a monopoly or cartel situation and foster competition, yet most airports seem to either be operated by people who don't care, crooks or idiots.