EVEN in the posher restaurants in Juba, the capital of South Sudan, the world's newest country, the menus are printed on cheap paper. It is not worth having more expensive ones when they have to be updated every few weeks. Thanks to an inflation rate that touched more than 50% a month at one point last year (the conventional definition of hyperinflation, though price rises have since eased off a bit), even a modest meal costs a brick-sized bundle of currency. Over the past year, the value of the South Sudanese pound has collapsed. It used to take 30 to buy a dollar; now it takes 120. The biggest banknote in circulation, the ssp100, is now the world's least valuable highest-denomination national note.
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