Out of idle curiosity, how do the TWG's proposals align with other countries GCT regimes?

Which countries tax what, at what rate, with what exemptions? What's the treatment of losses? What is or isn't ring-fenced? Are they simple? Are they complicated? What's the compliance burden? What's the workload like for the various versions of IRD? What sort of a contribution does it make to the overall tax take?

Something a little bit deeper than the TWG's report, or the parroting of "Other countries have a CGT so New Zealand should too" would be a welcome addition to the debate.