Concessions are agreements to do something grudgingly or as part of a compromise. In contract negotiations, concessions are often made and may involve the government granting something. Deadlocks occur when neither side is willing to compromise at all. Ways to break deadlocks include dampening adversarial urges, sharing problem solving, and appealing to the other party's sense of fairness. A position of strength in negotiations relies on having a strong alternative to an agreement, role power, and psychological power. Factors that contribute to a strong position are authority, credibility, information, time, emotional control, and communication skills.