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| C | D | |
| C | 150/150 | 75/175 |
| D | 175/75 | 100/100 |
The payoff (in DKK) of each person is given as: 
where: 
= initial endowment in “tokens” not varying across subjects, 
= tokens subject i contributes to the group public good account, 
= marginal payoff to each individual from the public good, and 
= the sum of the n individual contributions to the public good.
