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Several agents with different subjective probabilities make a binary decision at a time determined by a planner. Each agent chooses the action that has the highest probability of success. Given that their probabilities differ, so will their choices. From time 0 until decision time, all the agents are entitled to access the same increasing flow of information. The planner, who gains from having as many agents as possible making the right choice, faces the following tradeoff: the more information she feeds to the agents, the better off they will be in making their decisions, but the less likely they will be to diversify their actions, so the more difficult it will be for her to hedge her positions. The model gives rise to a continuous time optimal stopping problem.

Among the possible different complications of the perioperative period in subjects with terminal epathopaties undergoing OL.T, the pulmonary ones have a high incidence (20 % in literature) and are a frequent cause of morbility and mortality. We have to point out in our centre how serious the pulmonary complications are and which strategies can be employed to prevent them. For this reason 70 patients, undergoing OL.T.(43 male and 27 female), were studied for a period of 8 weeks after the operation. The mean time of the operation was between 6 and 14 hours. The intubation period after the transplant ranged between 2 hours (5 patients ) and 6 days in (10 patients); in most part of patients between 2 and 8 hours. An epidural catheter was inserted (T6-T7) preoperatively in 62 patients and it was used either during the operation and postoperatively. A tracheostomy was performed in 4 patients and a minitracheotomy was positioned in 15 patients to facilitate the airway toilette.