14 · game theory
Public Goods Game
Decide how much of $10 to contribute to a shared pot.
Scenario
You and 3 other strangers each receive $10. Each of you simultaneously and privately decides how much of your $10 to contribute to a shared pot (any amount from $0 to $10). The total contributions to the pot are then DOUBLED and divided equally among all four players, regardless of who contributed. Whatever you do not contribute, you keep. This is a one-time, anonymous game; you will never interact with these strangers again.
Question
How much of your $10 will you contribute?
02 · choices
- $0$0 (free-ride)
- $1–3$1–$3
- $4–6$4–$6
- $7–9$7–$9
- $10$10 (full contribution)
03 · aggregate distribution
$0 (free-ride)35/60 (58%)
$10 (full contribution)15/60 (25%)
$4–$610/60 (17%)
$1–$30/60 (0%)
$7–$90/60 (0%)
04 · by model
Claude Opus 4.7 Anthropic | $4–610/10 | read → | |
GPT 5.5 OpenAI | $1010/10 | read → | |
Gemini 3.1 Pro Google | $05/10 | read → | |
Grok 4.3 xAI | $010/10 | read → | |
Llama 4 Maverick Meta | $010/10 | read → | |
DeepSeek V4 Pro DeepSeek | $010/10 | read → |