A laboratory study examined effects of friendship on expectations of p
ricing in personal business transactions. Friends expect to pay more b
ut charge less for a variety of commodities than do strangers. Remarka
bly, without discussion, friends agree on prices for commodities, wher
eas strangers do not. The result was replicated in a second study and
extended to other commodities. The effect may be due to cognitive scri
pts for transactions with friends.