we’ve consolidated and simplified all that research, cross-referencing it with our experiences in the field and the case studies of our business school students, and found that people fall into three broad categories. Some people are Accommodators; others—like me—are basically Assertive; and the rest are data-loving Analysts. Hollywood negotiation scenes suggest that an Assertive style is required for effective bargaining, but each of the styles can be effective. And to truly be effective you need elements from all three.

