This has nothing to do with R as such; I'm simply trying to exploit the vast resource of knowledge and expertise that resides in the R community. For my sins, I am teaching a course on Game Theory this term. Game Theory I know from ***nothing***. I am trying to learn the subject as I go along, staying perhaps half a step in front of the students. I am having considerable difficulty with several elementary points, (vis-a-vis two person non-zero-sum games) and have not yet succeeded in clarifying these points from any of the books that I have managed to get my hands on. Is there any kind soul out there (or do any of you have a kind-soul colleague) who might be willing to discuss some of my game theory difficulties with me by email? Such a person would earn my undying gratitude. (Sorry that I can't offer a more substantial reward. :-) ) Since this is off-topic, please reply to me (only) at rolf at math.unb.ca and not to the list. Thanks, and thanks to everyone for their patience with my usurption of bandwidth. cheers, Rolf Turner