A few months back I wrote about the odd case of the Somali shilling. Despite the fact that Somalia's central bank was looted in 1991 and ceased to function thereafter, orphaned Somali shillings continued to circulate, and do so to this day. Along these same lines, so-called "Swiss Dinars" circulated in northern Iraq between 1993 and 2004 despite having been demonetized and discredited by their issuer, the Central Bank of Iraq (CBI). Why did shillings and dinars continue to have value despite being orphaned from/disowned by their issuer? The bigger question at stake is this: what gives so-called fiat money its positive price? The few bits of information I've found on the Swiss dinar come from a 2004 paper by Mervyn King, then governor of the Bank of England, a short article in the New York Times by Hal Varian, and a 2004 paper by Foote, Block, Crane, and Gray on the economic policy in Iraq. I've found a few odds and ends elsewhere from newspaper and numismatic...