I have been asked this question many times, and I have always had difficulty formulating a convincing response. However, I am going to present here a fascinating analysis of the question by Rabbi Dr. Aaron Levine of Yeshiva University. Rabbi Levine's insights have been frequently quoted on this site. His new book Moral Issues of the Marketplace in Jewish Law includes an extensive section on the important yet neglected topic of negotiation ethics. In my opinion, this chapter is an important contribution not only to Jewish ethics but also to the entire business ethics literature.