AbstractNegotiation is a process based on strategic choices. Each participant must fix carefully its objectives and decide what are the most appropriate ways and means in order to attain those. While in practice negotiation is always a mix of cooperation and competition, these two elements correspond to different approaches of the relationship and also different and quite incompatible orientations in term of strategy. The techniques, tactics and arguments employed by the negotiators in both cases will have different related effects and in the end will produce different and initially undefined outcomes. The choice of a strategy can be influenced by many factors, from the negotiator's power to the level of trust, the stakes or the concern for...