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 album four out of five stars and wrote that the "uber-futurist" production of the release accompanied with Rihanna's "Robo Dominatrix vocal approach—is a big reason the record works so well. "Good Girl Gone Bad: Reloaded" is all blue-light electronics and primal throb, 25th-century pop music in the here and now." Digital Spy's Nick Levine also gave "Good Girl Gone Bad: Reloaded" four out of five stars, but was skeptical about the choice to re-release the album, writing that "it isn't worth forking out for "Good Girl Gone Bad" twice just to hear the new songs". Despite that, he praised the