Phil surprises Claire with a new bracelet for their anniversary and Claire reciprocates with coupons for 5 free hugs, which Phil points out are usually free already. Claire is proud of her gift because Phil never wants anything, but Phil can list off many things he would like. Gift giving can be inefficient if it’s the two givers aren’t fully aware of the others’ preferences.

See more: coupons, exchange, gift giving, inefficiency, irrationality, medium of exchange, preferences, store of value, unit of account, wants