Related papers: Imitative Trust versus Indirect Reciprocity

This paper has been withdrawn by the authors as requested by the journal.

This paper has been withdrawn by the authors due to numerical problems to get viable results.

This paper has been withdrawn by the author.

This paper has been temporarily withdrawn by the author(s),

This paper has been temporarily withdrawn by the authors.

This paper has been withdrawn because the author no longer believes the firewall argument is correct.

This paper was withdrawn by the authors.

This paper has been withdrawn by the authors

This paper has been withdrawn by the author.

This paper has been withdrawn by the author due to an error.

This paper has been withdrawn by the authors.

This paper was withdrawn on 20.11.97.

This paper has been withdrawn by the authors due to some technical problems in the paper.

The paper is withdrawn by the authors and replaced be an improved and extended version arxiv: 0812.2968

This paper has been withdrawn by the corresponding author because the newest version is now published in Discrete Applied Mathematics.

This paper has been withdrawn

This paper has been withdrawn by the author for further investigation.

This paper has been withdrawn by the authors, due the copyright policy of the journal it has been submited to.

The paper has been withdrawn by the authors

This paper has been withdrawn by the authors due to some fatal errors in the analysis.