As with most negotiated agreements, neither side should feel like it's a good deal, but all should have sufficient, accurate information such that they can agre

As with most negotiated agreements, neither side should feel like it's a good deal, but all should have sufficient, accurate information such that they can agree on what the limiting externalities are and how they necessarily shape the final deal. Edit: I should note that this assumes a somewhat unlimited self-interest on both sides. Real people might not take all they can get even if it's offered, and real companies might not mind paying more than necessary even if they're not asked.