{
  "assignment_design": "balanced geographic cluster saturation arms followed by independent within-zone-period opportunity assignment",
  "config": {
    "cluster_noise_sd": 0.04,
    "confidence_level": 0.95,
    "history_effect": 0.7,
    "history_lags": 1,
    "individuals_per_cell": 20,
    "minimum_inference_clusters": 8,
    "n_clusters": 32,
    "n_periods": 32,
    "n_zones": 32,
    "neighbor_effect": 1.5,
    "outcome_noise_sd": 0.08,
    "own_effect": 2.0,
    "replications": 24,
    "saturation_levels": [
      0.0,
      0.3333333333333333,
      0.6666666666666666,
      1.0
    ],
    "seed": 880321
  },
  "estimand_definitions": {
    "controlled_history_exposure_response": "Per-unit response to the exact-lag own-treatment history holding current own and mapped-neighbor exposure fixed.",
    "controlled_zone_direct_effect": "Per-unit own-treatment response holding mapped neighbor and lagged exposure fixed.",
    "market_total_effect": "Full-horizon all-zone treatment versus all-zero under the benchmark's additive exposure mapping and startup history convention.",
    "spillover_effect": "Per-unit response to the predeclared mapped-neighbor exposure holding own and lagged exposure fixed."
  },
  "evidence_type": "semi_synthetic_exposure_mapped_known_truth_benchmark",
  "exposure_mapping": "two equal-weight ring neighbors declared before outcomes",
  "history_mapping": "mean of 1 exact own-treatment lag(s)",
  "known_estimands": {
    "controlled_history_exposure_response": 0.7,
    "controlled_zone_direct_effect": 2.0,
    "full_horizon_persistent_effect": 0.678125,
    "market_total_effect": 4.178125,
    "spillover_effect": 1.5
  },
  "market_total_bridge": "Known only because this benchmark declares an additive exposure-response DGP; controlled coefficients are not individually relabeled as market_total_effect.",
  "naive_assignment_status": "target mismatch; coefficient uncertainty is cluster-aware, but market-total bias, RMSE, coverage, and power are withheld"
}