Yes, indeed. I do believe that the intervention might work, but I could have imagined a better experimental design... and also, working as a waiter and bartender for 10 years, it's exactly such points about details that you raise that one needs to take into account.

Ours is RCT and theirs is a A-B-A reversal design.

Interesting, but sabeconomics.org/journal/RePE...

Thanks! And thank you for being there:) It was really a nice conference!

I hope they gave you a chair at some point! - and I love the touch that books are bought in baskets. That's how books should be bought:)

We’ve done experiments on this (placement effect)