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,
Bad Woman, Good Woman Bad Woman, Good Woman Bad Woman, Good Woman () is a 2007 South Korean television series starring Choi Jin-sil, Lee Jae-ryong, Sung Hyun-ah, and Jeon No-min. It aired on Mondays to Fridays at 19:45 on MBC from January 1 to July 13, 2007 for 140 episodes. The daily drama explores the true meaning of family and love, as a wife who considers herself a "good woman" agonizingly finds out about her husband's 6-year-long affair. Se-young is (Choi Jin-sil) is a devoted wife and mother who greatly values her family and home life. She loves her doctor husband Geon-woo (Lee Jae-ryong)