A review is made of various public goods experiments. It is found that the public goods environment is a very sensitive one with much that can affect outcomes but are difficult to control. The many factors interact with each other in unknown ways.
Nothing is known for sure.
Environments with public goods present a serious challenge even to skilled experimentalists and many opportunities for imaginative work. If you experience problems downloading a file check if you have the proper application to view it first. Information about this may be contained in the File-Format links below. Please be patient as the files may be large.