There is a group of four people. Each person in the group is given the same number of tokens. Each person must decide whether to keep the tokens, or to put them in a group pot. They can put in as few or as many as they like, and their choice is anonymous (they don’t see what the other people put in, and the other people don’t see what they put in). Once everyone has decided how many tokens to put in the group pot, the group pot is doubled and divided equally between all the group members. Therefore, the total number of tokens a person has at the end of the game is their share of the group pot plus the tokens they kept. |