Pierfrancesco La Mura

• Motivated by several classic decision theoretic paradoxes, and by analogies with the paradoxes which in physics motivated the development of quantum mechanics, we introduce a projective generalization of expected utility along the lines of the quantum-mechanical generalization of probability theory. The resulting decision theory accomodates the dominant paradoxes while retaining significant simplicity and tractability. In particular, every finite game wthin this larger class of preferences still has an equilibrium._x000D_ The paper was also published in: Journal of Mathematical Psychology, 53 (2009) 5, 408–414_x000D_ _x000D_ _x000D_ _x000D_ _x000D_