Medium of exchange was observed as early as Oresme, Copernicus and then in 1558 by Sir Thomas Gresham, that bad money drives out good in any marketplace (Gresham's Law states "Where legal tender laws exist, bad money drives out good money"). A more precise definition is this: "A currency that is artificially overvalued by law will drive out of circulation a currency that is artificially undervalued by that law." Gresham's law is therefore a specific application of the general law of price controls. A common explanation is that people will always keep the less adultered, less clipped, sweated, less filed, less trimmed coin,
Good Copy Bad Copy film was eventually released for free on the internet as a BitTorrent download. The filmmakers hope that releasing "Good Copy Bad Copy" for free will raise awareness and lead to other local broadcasting networks to show the documentary. The documentary first appeared on The Pirate Bay and then it was officially released under a Creative Commons Attribution-NonCommercial license on the Blip.tv video sharing site. On 8 May 2008, "Good Copy Bad Copy" was shown on SVT2, Swedish Television. On 8 September 2009, "Good Copy Bad Copy" was shown on YLE FST5, Finnish Television. On 5 January 2010, "Good Copy Bad