摘要：This paper draws up an approach over the Main Agent model, in conditions of information symmetry. At the beginning, the Main Agent model is emphasized in a general way, mentioning the main contributions brought in time on its development, its characteristics and the basic principles. Then, the hypothesis of the general model is illustrated, drawing a conclusion as regards the model's situations: Main neutral and Agent with risk aversion, Agent neutral and Main with risk aversion, and both partners having risk aversion
