John Public’s Practice Game Web Page
This is an example of a page that you will be using during the Tragedy of the Commons game. Read it to get a feel for how to play and interpret the game (you can’t use the submit button here but the rest of the page is identical to the one you will be using. This page shows the results of two rounds of the game – you will play several more rounds than that. Notice that names of players can be made available or not.
Welcome, John Public! This is your Web Page for playing the Tragedy of the Commons Game. During the course of the game, please stay on this page. Good luck and enjoy!
Some facts to remember:
- Cows cost $100 each.
- Each round you start with $10,000 (so, if you enter more than 100 cows, only 100 cows will be put on the commons).
- Your profits will be determined by how fat your cows are at the end of the year. That will depend on the following:
- How many cows you put on the commons.
- How many cows other ranchers put on the commons.
- You CAN lose money, since your cows cost $100 each. If the commons is seriously overgrazed, your cow will die.
CLASS RESULTS
Interpreting the commons picture: The green area is the size of the commons. When just filled with cows, the collectively optimal number of cows is on the commons. Green area without cows indicates that grazing MORE cows would increase community milk production. Grey cows indicate that too many cows are being grazed and grazing FEWER cows would increase community milk production.
Details of Round 1
No. of Revenue Profit
Name Cows or Loss Per Cow
30 520 17
50 867 17
29 503 17
17 295 17
88 1525 17
50 867 17
48 832 17
10 173 17
40 693 17
2 35 17
40 693 17
70 1213 17
25 433 17
40 693 17
35 607 17
Summary of Round: 1
Actual Optimal*
* = optimal would max total milk production
Farmers: 15 No optimal #
Cows: 574 300
Total milk: $ 9949.33 $ 60000
Milk/rancher : $ 663.28 $ 4000
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Details of Round 2
No. of Revenue Profit
Name Cows or Loss Per Cow
Goodwin, Emil 50 5406 108
Barron, Henki 30 3244 108
Okamoto, Risa 17 1838 108
Paulraj, Mall 18 1946 108
Mcclure, Kimb 15 1622 108
Murray, Mark 40 4325 108
Iwerks, Aliso 32 3460 108
Deets, Megan 25 2703 108
Smith, Eli 24 2595 108
Mezan, Kate 30 3244 108
Laughrey, Sar 20 2162 108
Silver, Mark 45 4866 108
Harrington, A 50 5406 108
Public, John 30 3244 108
Chi, Jennifer 21 2271 108
Lundgren, Kar 20 2162 108
Summary of Round: 2
Actual Optimal*
* = optimal would max total milk production
Farmers: 16 No optimal #
Cows: 467 320
Total milk: $ 50494.37 $ 64000
Milk/rancher: $ 3155.89 $ 4000
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Your Results So Far:
No. of Revenue Profit
Cows or Loss Per Cow
50 867 17
30 3244 108
Enter the number of cows you want to place on the commons this round:
and click this button.
Ronald B. Mitchell, Professor 