❖ 约翰的财富的效用 John’s utility of wealth
如果他购买保险，其确定效用＝
if he would buy insurance, his certainty utility=
U(财富=19500)=178 如果他不愿购买保险，其期望效用＝
if he wouldn't buy insurance,his expected utility=
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
保险费＝预期医疗保健支出
insurance premium= expected health care expenditure
=95%× 0 + 5%×10,000
=500
他的财富＝ 20,000-500=19500
His wealth =20,000-500=19500
他的确定效用＝
His certainty utility=
医疗保险 Health Insurance
❖ 医疗保险 Health surance
提供一种分散由疾病引起的财务风险的方式
Provide a way to diversify financial risks associated with illness
❖ 医疗保险的需求理论
The theory of demand for health insurance
