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I still don't get it

The good people at BBVA Research recently published a paper on central bank digital currencies (Central Bank Digital Currencies, Gouveia et al, March 2017) in which, amongst other conclusions, the authors say that “we also consider it likely that a scenario in which CBDC is anonymous, universal and non-yield bearing will be implemented”. But why is this “likely”? Why would any central bank bother setting up the form of distributed ledger that the authors envisage in order to implement something of such obvious utility to criminals, terrorists, money-launderers, tax-evaders and corrupt politicians? I don’t get it.

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