You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more
It's kind of hard to tell though right? That's the nature of averages. There are two other drivers: - Business gifts can be expensed. Airport is logical place to make that purchase - When people go on vacation they think: "this is going to hurt my pocketbook no matter what"
and they thusly spend without giving it the same thought that normal daily expenditures would get. Anyways, I agree with Dufry's thesis. Airport retail is robust to e-commerce. Luxury, convenience, home improvement, auto...these are the categories that Amazon will find tough.
