Hi all, Right, I would have cited Dellarocas' papers also because he is the only one I know that worked on this subject. However, IMHO, his claim that size of history doesn't matter is false. He took this conclusion in very a specific domain that is eBay-like market-places with very specific assumption (cf. cited paper). My idea is that size of history DOES matter. Let's imagine a system (even eBay-like) where every agent *knows* that the history is a list of the X last encounters experiences. Then it is easy to see that cheating 1/X times is a strategy that pays off (particularly in systems where ratings might be noisy). IMHO, the key point with respect to the history is that others should not be able guess its size. If it has a fixed size, I believe it doesn't matter if (and only if) other can guess its size (and therefore cannot use strategy as described above). However, I'm sorry I didn't have time to make any experimentations, but I'd like to hear if anybody has. Regards G. MULLER -- *************** http://www.guillaume-muller.tk/ *************** *MULLER Guillaume *** *** Office : 532 * *Phone: 33 4 77 42 66 84 ** ** 29 rue des Frhres Ponchardier* *Fax: 33 4 77 42 66 66 *** *** 42023 Saint-Itienne CIDEX 2 * *Principe unixien : "faire une seule chose et la faire bien". * *************************************************************** _______________________________________________ p2p-hackers mailing list p2p-hackers@zgp.org http://zgp.org/mailman/listinfo/p2p-hackers _______________________________________________ Here is a web page listing P2P Conferences: http://www.neurogrid.net/twiki/bin/view/Main/PeerToPeerConferences ----- End forwarded message ----- -- Eugen* Leitl <a href="http://leitl.org">leitl</a> ______________________________________________________________ ICBM: 48.07078, 11.61144 http://www.leitl.org 8B29F6BE: 099D 78BA 2FD3 B014 B08A 7779 75B0 2443 8B29 F6BE http://moleculardevices.org http://nanomachines.net [demime 1.01d removed an attachment of type application/pgp-signature]