Gresham's law that "bad money drives out good" suggests that demurrage fees would mean that a currency would suffer more rapid circulation than competing forms of currency. This led some such as German-Argentine economist Silvio Gesell to propose demurrage as a means of increasing both the velocity of money and overall economic activity. On the other hand, influential British economist John Maynard Keynes contended that Gesell's proposed demurrage fees could be evaded by the use of more liquid competing forms of money and that therefore inflation was a preferable method to achieve economic stimulation.