Tom MontoFloterial districts used in U.S. and Austria - loosely-skinned districts overlap to uncertain effect
Tom MontoU.S. uses Multi-Member Districts (MMDs) more than might be thought - federally in old days and in some states still today
Tom MontoThe Gove system - Indirect STV - potentially a useful variant of STV but never tried anywhere so far
Tom MontoAustralia - variety of electoral methods used -- STV, IRV, list PR, Contingent Voting. And the difference they made