So the trick in designing these kinds of situations is to understand where you're relying on the economic part of the bargain -- as with the parents paying the teachers -- and when you're relying on the social part of the bargain, when you're really designing for generosity.
Un triks, veidojot šādas situācijas, ir saprast, kad tu balsties uz ekonomisko darījuma daļas pusi -- kā ar vecākiem, kas maksā skolotājiem -- un kad tu balsties uz sociālo darījuma pusi, kad tu patiesībā veido dizainu dāsnumam.