Aristophanes on Inflation
It used to be that every economist worth his salt knew Gresham’s Law (or, if he was Polish, Copernicus’s Law): “bad money drives out good.” Narrowly understood, this rule says that when the government requires people to accept different forms of money at an exchange rate fixed by law, the form of money that is overvalued (the “bad money”) will circulate, while the form of money that is undervalued (the “good money”) won’t.