Computational Modelling in Philosophy
and the Social Sciences

This web site contains links to some evolutionary game theoretic models written in Java. The models are known to work in Internet Explorer, version 5 and up, and the most recent version of Mozilla.


You need to have the most recent Java plug-in installed.  To get that, go to the download page at Sun's web site and follow the instructions.  The installation is very easy, although it will take some time if you have a slow network connection.  You only need to do this once.

If you aren't using Windows, Java support is a bit hit-and-miss.  Mac OS X, so I am told, comes with support for Java 1.3 preinstalled.  If true, this means that these models should work under OS X.  If you are using Linux, you can find the Linux plug-in here.

You should probably have a reasonably fast computer to use these models.


Clicking on a link below will take you to the specified model.  The model may  take some time to load as the necessary JAR files are transferred to your computer.  If you are using a slow network connection (i.e., any telephone dial-up), the models will take some time to load.  On some machines, users have reported an unnaturally long delay before the models are useable.  If you suspect that things are taking longer than they should, hit the "Reload" button on your browser.  That usually solves the problem.

The models were designed for a minimum screen resolution of 800x600.  If your display does not support that, you may find them somewhat awkward to use since they will not fit entirely on screen.

Some useful tips:


The prisoner's dilemma

The stag hunt

The Nash bargaining game

The ultimatum game 


These models use the Jazz toolkit for constructing zoomable user interfaces developed by Ben Bederson at the University of Maryland and the ptplot package developed at UC Berkeley.  Source code available upon request.

J. McKenzie Alexander
Department of Philosophy, Logic and Scientific Method
London School of Economics and Political Science