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Message: <blockquote data-quote="mmadsen" data-source="post: 3715295" data-attributes="member: 1645">If you compare <a href="http://en.wikipedia.org/wiki/Purchasing_power_parity" target="_blank">purchasing power parity</a> across two currencies -- in this case, modern US dollars and quasi-medieval D&D coins -- the single ratio you come up -- in this case, one gold piece to 20 dollars -- cannot hold across all goods, since the ratios of prices of goods in modern America don't match the ratios of the prices of those same goods in quasi-medieval D&D-land, even if we restrict ourselves to goods that exist in both lands.For instance, a cup of sugar and a loaf of bread may cost roughly the same in modern America, but that pure sugar would cost orders of magnitude more than a loaf of bread in a quasi-medieval land.  There, it's a luxury of the highest order.</blockquote>