adverse selection 逆向选择
principle that says that those who most want to buy insurance tend to be those most at risk, but charging a high price for insurance (to cover the high risk)will discourage those at less risk from buying insurance at all
asset 资产
any item that is long-lived, purchased for the service it renders over its life and for what one will receive when one sells it
assistance in kind 实物援助
public assistance that provides particular goods and services, like food or medical care, rather than cash
asymmetric information 信息不对称
a situation in which the parties to a transaction have different information, as when the seller or a used car has