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 Girl Gone Bad: Reloaded weeks. In early 2008, Rihanna unveiled a new song titled "Take a Bow", which premiered on February 14, 2008 on the KIIS-FM radio show "On Air with Ryan Seacrest". MTV News reported that the track would serve as the lead single from "Good Girl Gone Bad: Reloaded", a reissue of the original album to mark its first anniversary. Rihanna further announced that apart from "Take a Bow", the expanded album would contain two more songs, one of which was a duet with American pop rock band Maroon 5, to supplement the original track listing. "Good Girl Gone Bad: Reloaded" was