There are 22 players, who live in the same apartment building.
Each player gets 10 energy tokens (worth $0.10 each) at the start of each
month. Each token represents 1 unit of energy use beyond your basic needs.
You will play 12 rounds (for each “month” of a year). In each month, every player
faces the same monthly decision problem: how much energy to keep in your private account
versus how much to conserve (by putting it in the group conservation account).
To meet the 60% (=1,584 tokens)
energy reduction goal, each player should donate an average of 6 energy tokens every
month to the group conservation account.