古代国际货币的良币驱逐劣币法则

Group 1 - The concept of "bad money drives out good money" applies primarily to domestic currency circulation, where bad money is supported by domestic laws and thus preferred by holders [1][2] - In ancient international trade, the opposite principle applies, where good money drives out bad money, as exporters only accept good money [1][4] Group 2 - The phenomenon of bad money driving out good money can be illustrated by the example of the Roman Republic, where the weight of the As copper coin decreased over time, leading to a market filled with lighter, less valuable coins [2][3] - The introduction of various types of coins in the late medieval period, such as the Florin and Ducat, demonstrates the transition from bad money to good money in international trade [10][11] Group 3 - The emergence of convertible currencies in modern times is a result of the evolution of international markets, where ancient international currencies already exhibited characteristics similar to modern convertible currencies [6][7] - The distinction between convertible and inconvertible currencies is crucial, as inconvertible currencies are subject to strict foreign exchange controls, limiting their international usability [9]