Wholesale record prices are highly visible—a few prices in company catalogues account for the bulk of sales—which suggests that firms could plausibly co-ordinate on an agreed tariff.

This week, one London-based company specialising in money transfers to Zimbabwe posted on the internet a tariff of Z$40,000 to the British pound (Z$20,250 to the greenback).

This week, one London-based company specialising in money transfers to Zimbabwe posted on the internet a tariff of Z$40, 000 to the British pound (Z$20, 250 to the greenback).