I was bored so I went googling for PE and came across this paper that some University students from “Handelshögskolan” has made. I who enjoy to play and not as much to discuss as many here got bored after 2 lines of reading. But I guess I’ll post it anyway if it may intrest anyone who can understand it. Dont kill me if it bores you to death 
http://www.informatik.gu.se/~klang/gu/ehandel_04/Czari_Loven_Lundstr�m.pdf PDF