{{ extends "global/Page.html" }} {{ load otree static }} {{ block title }} Comprehension Check {{ endblock }} {{ block content }} {# APP: oathexp (First Mover) | FILE: ComprehensionQuiz.html #}

Before we continue, please make sure you understand how payoffs are calculated.

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Your payoff = (20 − your contribution) + 0.5 × (total contributions by all three players)

To illustrate how payoffs are calculated, we show a few hypothetical examples below.

Example 1 — Everyone contributes 0
Group member Contribution Tokens kept
(20 − contribution)
Project share
(0.5 × total)
Total payoff
Member A 0 20 0.5 × 0 = 0 20
Member B 0 20 0.5 × 0 = 0 20
Member C 0 20 0.5 × 0 = 0 20

Total contributions = 0 + 0 + 0 = 0. Each group member keeps all 20 tokens and receives nothing from the project.

Example 2 — Everyone contributes 20
Group member Contribution Tokens kept
(20 − contribution)
Project share
(0.5 × total)
Total payoff
Member A 20 0 0.5 × 60 = 30 30
Member B 20 0 0.5 × 60 = 30 30
Member C 20 0 0.5 × 60 = 30 30

Total contributions = 20 + 20 + 20 = 60. Each group member contributes all tokens but earns 30 from the project.

Example 3 — Group members contribute different amounts
Group member Contribution Tokens kept
(20 − contribution)
Project share
(0.5 × total)
Total payoff
Member A 4 16 0.5 × 28 = 14 30
Member B 8 12 0.5 × 28 = 14 26
Member C 16 4 0.5 × 28 = 14 18

Total contributions = 4 + 8 + 16 = 28. Each group member receives the same project share (14 tokens), but keeps different amounts.


Your turn — calculate the payoffs

In this scenario, Member A contributes 5 tokens, Member B contributes 10 tokens, and Member C contributes 15 tokens.

What is the total payoff for each group member?

Group member Contribution Tokens kept
(20 − contribution)
Project share
(0.5 × total)
Total payoff
Member A 5 15 ? ?
Member B 10 10 ? ?
Member C 15 5 ? ?
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