This model is an extension of the Altruism model. It explores how population viscosity affects the reproductive success of populations exhibiting cooperative and greedy behaviors.

For detailed instructions on using the program, take a look at the info window from the Cooperation model.

Download the StarLogoT source code for the Cooperation model:
Download cooperation

To run this file you need StarLogoT2002 for the Macintosh.
(download StarLogoT)

Click on one of the pictures to see a quicktime movie of the model: