Venezuela has a fixed official exchange rate of 2.15 to the dollar.

WSJ: Ch��vez Spurs Bank Fears

One cause of Myanmar's financial mess is the cost of the army (see chart, which, by using the ludicrous official exchange rate, significantly understates the cost of imported weapons).

ECONOMIST: Myanmar

It also managed to narrow the gap between the official exchange rate and the price of the dollar in the free market.

ECONOMIST: Venezuela's economy

Since the rules were introduced in November 2011, Paypal has been used as an alternative means of obtaining the US currency close to the official exchange rate, which currently stands at about 4.7 pesos per dollar.

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With hyperinflation, a gap of around 10:1 has opened up between the official exchange rate operated by the bank and the true rate reflected in the black market.

ECONOMIST: How to prop up the government

The magic price would be higher still today, given inflation (the official exchange rate is pegged to the dollar) and the further expansion of the state through the nationalisation of private businesses.

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