Measuring Efficiency in Redistricting

摘要: Abstract There has been a recent surge in work on measuring partisan bias single-member (SMD) redistricting plans. A classic SMD gerrymander is “efficient”: it “cracks” party's supporters so they barely lose many seats and “packs” the remainder few that party wins by large margins. This essay classifies these new metrics proposes simple principle for evaluating each metric as gauge of this efficiency. It finds only methods measure packing cracking directly through counting wasted votes can serve consistent measures concept. Indeed, symmetry seats-votes curve not fail to consistently efficiency but suffer from internal contradictions certain circumstances. Further examination reveals modified version “efficiency gap”—a active ongoing litigation—can under wide range electoral Among rest, there ...