{
  "default_adoption_sweep": {
    "g0": {
      "top10_share": 38.7,
      "gini": 0.52
    },
    "g10": {
      "top10_share": 44.2,
      "gini": 0.563
    },
    "g20": {
      "top10_share": 49.7,
      "gini": 0.606
    },
    "g30": {
      "top10_share": 55.1,
      "gini": 0.649
    },
    "g40": {
      "top10_share": 60.6,
      "gini": 0.692
    },
    "g50": {
      "top10_share": 66.2,
      "gini": 0.735
    },
    "g60": {
      "top10_share": 71.7,
      "gini": 0.778
    },
    "g70": {
      "top10_share": 77.2,
      "gini": 0.822
    },
    "g80": {
      "top10_share": 82.8,
      "gini": 0.865
    },
    "g90": {
      "top10_share": 88.4,
      "gini": 0.908
    },
    "g100": {
      "top10_share": 93.9,
      "gini": 0.952
    }
  },
  "platform_baseline": {
    "top10_share": 84.0,
    "gini": 0.95
  },
  "note": "attention concentration across assets; g = fraction of users who use the single popular default template instead of their own/diverse lens. g=0 is full user sovereignty/diversity; g=1 collapses toward a single global feed."
}