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 Good Girl Gone Bad: Reloaded Good Girl Gone Bad: Reloaded is the reissue of Barbadian singer Rihanna's third studio album "Good Girl Gone Bad" (2007). It was first released digitally in selected countries on June 2, 2008, by Def Jam Recordings and SRP Records. Launched to mark the first anniversary of the original album, "Good Girl Gone Bad: Reloaded" features three newly recorded songs and a DVD showing exclusive behind-the-scenes footage of Rihanna's worldwide tour, the Good Girl Gone Bad Tour (2007–2009). For the new material, she worked with past collaborators Ne-Yo, StarGate, and C. "Tricky" Stewart, as well as