the ability of a party to influence decision-making in negotiations through the use of power, which certainly has certain costs, such as the erosion of trust and the loss of long-term relationships and reputation. Effective negotiators use power, especially expert and referential, subtly and undemonstratively. It is important that the “price of power” in negotiations is not only the possession of power, but also its effective use to achieve favorable terms of the agreement, which is a key factor in the success of any negotiations.