财富 效用 边际效用
10,000
100
12,000
130
14,000
165
16,000
205
18,000
250
19,500
280
20,000
300
2021/3/12
10
医疗保险 Health Insurance
效用函数 Utility function
U Yb
=生病的概率×生病时的财富所带来的效用+健康的概率× 健康时的财富所带来的效用 =probability of illness × utility of wealth with illness + probability of healthy × utility of wealth with healthy
2021/3/12
15
保险怎样影响医疗保健的需求
How Insurance Affects a Demand Curve for Health Care
没有保险
pm
时的需求
具有50%共付
率保险的需求
30
15
0
5
10
15
m
2021/3/12
16
道德风险 Moral Hazard
道德风险 Moral hazard problem
他也可以自我保险 He can self-insure
生病概率小,但是一旦生病损失很大 small possibility of a large loss if the illness occurs
不生病的概率大,也没有医疗支出 large possibility that the medical loss will not occur