lwzxy 发表于 2009-11-10 20:55
也说Gresham's Law.
Popularly stated: "Bad money drives out good money." More correctly stated: When a government recognizes more than one kind of money as legal tender, there is a tendency for the legally overvalued money to become the universally used medium of exchange, while the legally undervalued money disappears as a medium of exchange.
Actually, Gresham's Law is only a special case of the more general economic law that in a market economy no commodity is ever allocated to perform a function for which it is known that a cheaper commodity would serve as well.

alonglongriver 发表于 2010-2-15 05:05 现在都无纸化了，劣币驱逐良币的延申应用才是值得我们考虑的。