If you're going to do this, you should leave out X. The larger the differential between X and Y, the higher the unconscious (or perhaps even conscious) bias wil

If you're going to do this, you should leave out X. The larger the differential between X and Y, the higher the unconscious (or perhaps even conscious) bias will be against you. "This guy wants a 40% raise to come work for us" vs. "This guy wants $Y to come work for us."