{{ block title }} Instructions {{ endblock }} {{ block content }}
Each participant in the group can choose to harvest from a stock of resource A each round. The initial stock of A is 50 units, and each unit is worth {{ Constants.A_value }}.
Choices are made individually but their total sum will affect the stock. The stock of A is linked to a second stock of resource, called B, which you cannot harvest directly. For each harvested A-unit, a B-unit will also be detracted from the stock of B. After every harvesting round, the two stocks grow again at given recovery rates. Each B-unit regrown is worth {{ Constants.B_value }}.
At the end of each round, the sum of all harvested A-units will be deducted from the two stocks and each participant will be paid. The individual payoff is so constructed: {{ Constants.A_value }} * A-unit individually harvested + {{ Constants.B_value }} * B-units regrown.
Please look at the following image to familiarize with the stock levels and their respective growth rates (Remember: the image will also be displayed during each round).
Example: P1 harvests 10 units, while P2 harvests 5, and P3 and P4 harvest 2 units each. Both stock go down to: 50 – (10 + 5 + 2 + 2) = 31 units. Therefore their respective payoffs are so calculated:
P1 = 10 * {{ Constants.A_value }} + 12 * {{ Constants.B_value }} = 0.40 + 0.24 = 0.64 US$
P2 = 5 * {{ Constants.A_value }} + 12 * {{ Constants.B_value }} = 0.20 + 0.24 = 0.44 US$
P3 = 2 * {{ Constants.A_value }} + 12 * {{ Constants.B_value }} = 0.08 + 0.24 = 0.32 US$
P4 = 2 * {{ Constants.A_value }} + 12 * {{ Constants.B_value }} = 0.08 + 0.24 = 0.32 US$
If the group harvests a total of 19 units from A-stock in round 1, in round 2 players will still see 50 units available in B-stock, whereas in round 3 the stock will be updated.
If the stock goes below 20 units, the recovery rate falls. If the threshold (20 units) is crossed, the stock has to reach a level of 25 units to move back to a high growth rate. If the total group harvest exceeds the available A-stock at any time, the group loses and the game ends.
You have two minutes to make a choice about how much to harvest. If time finishes and you have not chosen, the computer will automatically force you to leave the experiment.
All choices remain anonymous. However, you can communicate with the rest of your group in the chat.
The individual payoff for each round sums up and it is transformed into real currency.
{{ formfield player.understanding }} {{ next_button }} {{ endblock }}