ABSTRACT
Every day we are faced with decisions. Some small – should you take your umbrella to work? Should you have salmon or steak for dinner? Some larger – should you take out travel insurance? Should you buy a laptop or a desktop computer? And some monumental – should you believe in God? Which football team should you support? Despite their diversity these decisions all share a common structure. They involve choices between several options, they concern future states of the world that are uncertain or unknown, and they have varying degrees of importance or value to you.
