{
 "name": "The Hague Return Accountability Index",
 "version": "1.0",
 "status": "Provisional",
 "weights": {
  "returnEffectiveness": 35,
  "speedEnforcement": 20,
  "cooperation": 15,
  "transparency": 15,
  "costEfficiency": 10,
  "dataQuality": 5
 },
 "confidenceGate": 0.35,
 "tiers": [
  {
   "tier": 1,
   "label": "Strong measured return performance",
   "min": 80
  },
  {
   "tier": 2,
   "label": "Good measured performance",
   "min": 65
  },
  {
   "tier": 3,
   "label": "Mixed measured performance",
   "min": 50
  },
  {
   "tier": 4,
   "label": "Weak performance / documented concern",
   "min": 0
  }
 ],
 "globalBenchmarks": {
  "returnRate2021": 39,
  "returnRateSeries": "50% (1999); 51% (2003); 46% (2008); 45% (2015); 39% (2021)",
  "avgDays2021": 207,
  "art11AspirationDays": 42,
  "over300DaysPct2021": 24,
  "voluntaryReturnPct": 16,
  "judicialReturnPct": 23,
  "applicationsResponding2021": 2191,
  "estimatedGlobalApplications2021": 2720,
  "childrenInvolved2021": 2783,
  "source": "HCCH_19A"
 },
 "formulas": {
  "overall": "Σ(score_i×weight_i)/Σ(weight_i) over measured categories",
  "transparency": "40·survey2021 + 30·longitudinal + 15·bothFlows + 15·access",
  "confidence": "evidence×(0.35+0.65·breadth); evidence=0.6·meanTier+0.4·freshness"
 },
 "definitions": {
  "returnedChild": "physically returned to habitual residence",
  "resolvedReturnCase": "officially closed by any means; NOT necessarily a return",
  "proxyData": "covers U.S.-related cases only"
 }
}