[prokes]

I can't understand why this is being downvoted.

Declanomous is offering a hypothesis that improves on the original comment of giving away seats. While the impact of buying a drink vs. receiving a drink may differ, and the study only studied "buys", peer pressure works in other ways, too. One could argue that people drinking in the vicinity "pressures" or influences others to drink, so the solution Declanomous provided could 1) increase beverage revenue at low cost and 2) increase customer good will (the free drink recipient) at low cost.

In fact, Southwest may know this as they send out free drink coupons to frequent flyers.

[Declanomous]

Thanks for backing me up. My experience Southwest is actually what made me think of that. I used my free drink coupon on a flight recently. The person sitting across from me ended up changing their order to a alcoholic beverage as well. It works just as well as purchasing a drink in any case, because you order before you present the coupon.

I suggested a card, such as a gift card, because I suspect watching someone swipe a card has a larger effect than watching someone hand over a printed coupon. It would also work for those back-of-seat infotainment systems that allow you to swipe a card to buy something.

I work in marketing for a non-profit, and I spend a lot of time figuring out how to get people to tell other people they gave to us. I'm sure this is marketing 101. The funny thing is that I probably overthink marketing experiments. I love pouring over data like Gardete did, but most of the other marketing people I know would just use A|B testing. Even though their experimental design makes me shudder, it gets the job done. From the perspective of a middle manager, it doesn't really matter if you understand the solution as long as it works. I think understanding why allows you to build on your successes and failures, but that's a self-serving bias.