The Public Goods Game
A live, interactive experiment that demonstrates the Nash Equilibrium through a classic Public Goods Game. Participants join via QR code, receive an endowment each round, and decide how much to contribute to a shared pool. Contributions are multiplied and redistributed equally — creating a tension between self-interest and collective benefit. The Nash Equilibrium predicts zero contribution, but real humans often cooperate.
Players scan a QR code to instantly join the game session from any device
Admin starts and ends rounds; player screens update live via polling
Optional phone verification via Twilio Verify API to prevent duplicates
Full-screen stats page with contribution distribution, cooperation trend, and Nash/Social Optimum reference lines
Toggle between dark and light themes; preference saved across sessions
Cooperation rate, median, min/max, participation rate, free rider percentage, and total distributed
Round results sent to players via SMS with delivery tracking
Full control panel for starting rounds, viewing stats, and managing game sessions