I have a feeling that a few more people need to go and read Tim Harford\’s Undercover Economist. It\’s got one of the best explanations of Ricardo on rent out there. And he uses coffee shops as his example.
In a competitive market we would expect all of the profits to accrue to the landlords, not the coffee shops. A very interesting thing to look at would be whether Costa owns its shops and Starbucks rents them for example….