Certainty Effect(2) Game 2 A 33%get 2, 500, 67% get nothing B. 34% get 2, 400, 66% get nothing 你的選擇是A或B 83 0.33U(2500)>0.34U(2400)
11 Certainty Effect(2) ▪Game 2 ▪A. 33% get 2,500, 67% get nothing ▪B. 34% get 2,400, 66% get nothing ▪你的選擇是A 或 B ▪83% ▪0.33U(2500) > 0.34U(2400)
Reflection Effect Game 1 - A. 80% get 4,000 and 20%o get nothing B.100%get3,000 n你的選擇是A或B Game 2 A. 80% loss 4,000 and 20% loss nothing B.100%loss3.000 n你的選擇是A或B
12 Reflection Effect ▪Game 1 ▪A. 80% get 4,000 and 20% get nothing ▪B. 100% get 3,000 ▪你的選擇是A 或 B ▪Game 2 ▪A. 80% loss 4,000 and 20% loss nothing ▪B. 100% loss 3,000 ▪你的選擇是A 或 B
Isolation Effect Game 1 75% get nothing 25%get another chance -80% get 4000, 20% get nothing 100%get3000 25%get3000and20%get4000 Game 2 20%get4000 25%get3000
13 Isolation Effect ▪Game 1 ▪75% get nothing ▪25% get another chance ▪80% get 4000, 20% get nothing ▪100% get 3000 ▪=> 25% get 3000 and 20% get 4000 ▪Game 2 ▪20% get 4000 ▪25% get 3000
Prospect Theory Value function Decision weighting function
14 Prospect Theory ▪Value function ▪Decision weighting function
Value function (1) 價值函數是定義在相對於某個參考點的 利得和損失,而不是一般傳統理論所重 視的期末財富或消費 2.價值函數是S型函數,在利得時是凹函數, 在損失時是凸函數 v(x)<0,x>0;v(x)>0,x<0 3.損失的斜率比利得的斜率要陡
15 Value function(1) 1. 價值函數是定義在相對於某個參考點的 利得和損失,而不是一般傳統理論所重 視的期末財富或消費. 2. 價值函數是S型函數,在利得時是凹函數, 在損失時是凸函數. 3. 損失的斜率比利得的斜率要陡 ( ) 0, 0; ( ) 0, 0 '' '' v x x v x x