In this the third part of the article on uncertainty, agent relationships and asymmetrical information, Doctor Lara passes through Reykiavik and London on her to her final description in Seville. She takes advantage of this analogy to conceptualize the problem of principal and agent, analyzing generic agency relationships pertaining directly with health organizations. When dealing with the interesting question if the problem of principal and agent in health organizations can be lessened, a few equally interesting answers were formulated: allow the professionals to assume the mission and the values of the organization; a well thought out leadership policy; and improvement in information provided; an incentive policy; compatibility of interests between the principal and the agent; ethics and competitive advantage; quality management....