Policymakers are struggling to accommodate cryptocurrencies within tax systems not designed to handle them; this paper reviews the issues that arise. The greatest challenges are for implementation: crypto's quasi-anonymity is an inherent obstacle to third-party reporting. Design problems arise...

The sharing between national tax authorities of taxpayer-specific information has emerged over the last few years as a - probably 'the' - central issue in the formation of international tax policy. Yet this refocusing of the debate on international taxation - away from parametric tax...