“...Choices among risky prospects exhibit several pervasive effects that are inconsistent with the basic tenets of utility theory. In particular, people underweight outcomes that are merely probably in comparison with outcomes that are obtained with certainty...” --- Daniel Kaheman and Amos Tversky "Prospect Theory: An Analysis of Decision Under Risk",1979。
”...The value function is normally concave for gains, commonly convex for losses, and is generally steeper for losses than for gains... which exhibits risk aversion for positive prospects and risk seeking for negative ones...” --- Daniel Kaheman and Amos Tversky "Prospect Theory: An Analysis of Decision Under Risk",1979。