Water rights game: This game (Fig. 2b) was presented by Galaz (2004) and raises the question of cooperation or
defection when the balance of water use is modified. In this game there are two players (a) a group of farmers and
(b) an urban water company. At status quo the two water users have an agreement about the consumption of existed
water resources. The game analyses what happens when one player (for example, the urban company) breaks this
agreement. The other player can either accept the violation or not. The answer on this problem depends on the
preference order of both players.