国际清算银行：货币体系的弹性（英文版）

Money forms the backbone of the economy and financial system. To play this role, it needs to pass three key tests. First, it needs to be accepted by agents in the economy at par with “no questions asked”. This is often referred to as the “singleness of money”. Second, it must support the integrity of the monetary system against financial crime and other forms of illicit activity. And third, it must expand and contract flexibly to meet the changing needs of the economy – a feature often referr