Thanks a lot!
The solution is much more simpler than I had expected. I had thoughtthere might be prabability theory or Bayesian rule applied. The answerreally agrees with my initial gut-feeling. I just felt my initialimpression might be too simple to be correct.
Btw, I have no background in game theory. Could you let me knowwhich book has the Bertrand non-cooperative model? Any downloadableones here in this forum? Thanks again.