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This task is about an exchange within a group. You are randomly assigned to a group with three other persons. None of the four group members knows the identity of the other group members and no one will knowingly meet each other. Each group member is endowed with 10€.

You are asked to decide how much of your endowment you want to keep for yourself and how much you want to contribute to a group account. You can choose to contribute any amount between 0€ and 10€. Each group member has the same choice to make. You will play 20 rounds of this game with the same people. Everyone will see each other's contributions and earnings at the end of each round.

Your choice influences your own and the other group members’ payment. Likewise, the group members’ choices influence your payment.

That is:

-The amount you keep simply remains in your possession: For every 1€ you keep, you will receive 1€ in payment.

-The amount you and the other group members contribute to the group account is summed up to a total amount.

This total amount is doubled (by the experimenter) and then equally split among all group members, including you. Thus, for every 1€ contributed to the group account by any one group member, all four group members (including you) receive 0.50€. Your payment is the sum of the amount you keep + 0.5 * the total amount contributed to the group account

You will play a NAME OF GAME in which the whole group responds together at the same time.

You will see a countdown from 20 - all group members should give their contribution together at the same time, as soon as the counter reaches 0. Responding too quickly or slowly will result in a penalty.

Each group member is represented by a box on the screen (your player number is displayed on your box). As soon as you make your contribution your box will turn green - this means that all group members can see exactly when each other's contributions are made.

This Experiment will take around X minutes, and your payment will be calculated based on the amount of money that you earn.

Recap:

- For every round your payment is: amount you keep + 0.5 * doubled group account

- Each round starts at 20 seconds and everyone responds once the timer hits 0

- 20 rounds within the same group

Before you start the Experiment you will be asked four test questions. If you get more than one wrong, you will be required to re-read the instructions and will be tested again. If you fail the test a second time, you will not be able to proceed and will be removed from the study.rn green - this means that all group members can see exactly when each other's contributions are made.

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