Example image of eyePlorer eyePlorer map for 'Gresham's law': Commodity money Face value Legal tender Financier Thomas Gresham Tudor dynasty American Gold Eagle Austria Bullion coin Krugerrand Maria Theresa thaler South Africa Coin collecting Seigniorage Coins of the Canadian dollar Coins of the United States dollar Silver Debasement Penny (Canadian coin) Penny (United States coin) Steel Banknote Nicaragua Polymer banknote Coin Alloy Base metal Coin clipping Counterfeit Fiat money Penny (British pre-decimal coin) Sixpence (British coin) Half dollar (United States coin) Copper Nickel (United States coin) Zinc Gold standard George Selgin Monetae cudendae ratio Nicolaus Copernicus BC The Frogs Ibn Taymiyyah Robert Mundell Lemon (automobile) Used car The Market for Lemons Vannevar Bush What Has Government Done to Our Money? Ludwig von Mises Institute