## Lab Games

1. Play this coordination game: After being separated during a term break, you are to meet a fellow student on campus on the first day of classes at twelve noon. You did not make an arrangement regarding where to meet and your cell phone has been stolen. You both have to guess where to meet and try to make your guesses coincide. Note that the two of you have identical interests, but you will succeed only if you make identical choices. You win only if you do what the other expects you to do.

2. Working in pairs, play the repeated Prisoner's Dilemma. Two of you can sit at the front of the classroom, backs to each other, and at successive indications from the instructor, you can raise either a green card, indicating cooperation (C), or a red card, indicating defection (D). Both players should raise their cards simultaneously, without being able to see the other's action in anticipation. The game must be played multiple times until the instructor ends it. The scores are the following: – One player chooses D (5 points) while the other chooses C (0 points).
– Both choose C (3 points each).
– Both choose D (1 point each).
First, make the following decisions:
– Retaliate (or not) to the other player's decision at the next play.
– Remember past grievances or forget and forgive. Remember that to win the match you need not win every play.
–Show a clear criterion of conduct or, rather, be confusing and unpredictable.

At the beginning of the game you can announce what you are doing to do (or what you intend the other player to believe you are going to do). Remain silent throughout the rest of the game, taking into account only the other player's decisions.

Somebody should record the scores of each play and make the final sum at the end of the game. Observe whether mutual cooperation emerges and becomes more frequent with the play of the game. The results may be different if the players know how many times they are going to play their interaction or not. Discuss.

3. Play the repeated Prisoner's Dilemma game and register your scores by using any of these websites:
www.gametheory.net/Web/PDilemma
www.paulspages.co.uk/hmd