partner A,B
Sender A get s,send message to B
Receiver B 收到此消息并决定是否服从
如果参与者 A 只关心他自己的实验支付,则将始终报告 r = 6
参与者A,B的回报
$$ \pi_{A}=10+2 \cdot r $$
$$ \pi_{B}=\left\{\begin{array}{ll}10 & \text { if } B \text { follows and } r=5 \\ 0 & \text { if } B \text { follows and } r \neq s \\ 3 & \text { if } B \text { does not follow. }\end{array}\right. $$