Set your class up once, then just type each group's contribution after every round.
Default endowment 80 = a group of two Big Firms (25) + two Startups (15). Edit any group's endowment in the table header.
Each round: type how many tokens each group put in the fund
The last column is the whole class's average contribution rate — that's the number the chart below plots.
Class average contribution by round
Project this. Watch the line move as you enter each round — the pattern is the whole point of the debrief.
Group leaderboard (collective tokens earned so far)
A group's round total = tokens kept + the doubled fund it gets back = endowment + contributed. Higher = the group cooperated more.
Copy results
This page doesn't save after a refresh — copy this if you want to keep the numbers.
One-round score calculator
Enter each player's tokens and how many they put in the fund. See who comes out ahead — great for demoing the individual incentive live.
Notice: every player gets the same share of the fund, no matter what they put in. Keeping tokens is worth 1 each to you; a token in the fund becomes 2 but is shared by everyone.