{
  "report_id": "066-usage-concentration-continuity",
  "status": "validated",
  "version": "1.0",
  "publication": {
    "headline": "Cuando el núcleo frecuente es más estrecho, la continuidad baja 6 puntos",
    "canonical_url": "https://wodbuster.com/observatorio/concentracion-uso-continuidad-centros-deportivos/",
    "date_modified": "2026-07-18"
  },
  "period": {"start": "2025-01-01", "end": "2025-12-31"},
  "sample": {"matched_centers": 1782},
  "definitions": {
    "frequent_core": "Participantes con ocho o más asistencias durante el mes.",
    "concentration_gap": "Diferencia entre el porcentaje de asistencias y el porcentaje de participantes aportado por el núcleo frecuente.",
    "observed_continuity": "Parte de los participantes activos de Q1 observada también en Q4.",
    "adjustment": "Cuartiles de brecha de concentración dentro de combinaciones de tamaño, frecuencia mensual y ocupación."
  },
  "findings": {
    "low_gap_core_participant_share_pct": 58.90,
    "high_gap_core_participant_share_pct": 50.55,
    "low_gap_core_attendance_share_pct": 77.17,
    "high_gap_core_attendance_share_pct": 77.13,
    "low_concentration_gap_pp": 17.33,
    "high_concentration_gap_pp": 25.84,
    "low_gap_q1_seen_again_q4_pct": 64.02,
    "high_gap_q1_seen_again_q4_pct": 57.98,
    "concentration_gap_continuity_difference_pp": -6.04,
    "concentration_gap_replacement_difference_pp": 7.59,
    "concentration_gap_growth_difference_pp": 3.05,
    "full_year_gap_continuity_difference_pp": -5.27,
    "attendance_share_continuity_difference_pp": 0.10,
    "participant_share_continuity_difference_pp": 4.60
  },
  "series": {
    "concentration_gap_adjusted_quartiles": [
      {"group":"Concentración baja","centers":467,"core_participant_share_pct":58.90,"core_attendance_share_pct":77.17,"concentration_gap_pp":17.33,"typical_active":145.0,"visits_per_active":8.34,"occupancy_pct":50.84,"q1_seen_again_q4_pct":64.02,"q4_not_active_q1_pct":38.70,"q4_vs_q1_change_pct":2.94},
      {"group":"Media-baja","centers":435,"core_participant_share_pct":55.90,"core_attendance_share_pct":76.50,"concentration_gap_pp":20.08,"typical_active":146.0,"visits_per_active":8.34,"occupancy_pct":50.06,"q1_seen_again_q4_pct":61.35,"q4_not_active_q1_pct":41.76,"q4_vs_q1_change_pct":4.95},
      {"group":"Media-alta","centers":464,"core_participant_share_pct":54.25,"core_attendance_share_pct":77.38,"concentration_gap_pp":22.42,"typical_active":143.5,"visits_per_active":8.43,"occupancy_pct":49.43,"q1_seen_again_q4_pct":60.00,"q4_not_active_q1_pct":42.23,"q4_vs_q1_change_pct":4.29},
      {"group":"Concentración alta","centers":416,"core_participant_share_pct":50.55,"core_attendance_share_pct":77.13,"concentration_gap_pp":25.84,"typical_active":149.5,"visits_per_active":8.42,"occupancy_pct":49.47,"q1_seen_again_q4_pct":57.98,"q4_not_active_q1_pct":46.29,"q4_vs_q1_change_pct":5.99}
    ],
    "sensitivity": [
      {"measure":"Brecha de concentración, 6+ meses","centers":1782,"continuity_difference_pp":-6.04},
      {"measure":"Brecha de concentración, 12 meses","centers":1545,"continuity_difference_pp":-5.27},
      {"measure":"Peso de participantes frecuentes","centers":1782,"continuity_difference_pp":4.60},
      {"measure":"Peso de asistencias frecuentes","centers":1782,"continuity_difference_pp":0.10}
    ]
  },
  "quality": {
    "minimum_eligible_months": 6,
    "minimum_active_per_month": 20,
    "minimum_active_per_quarter": 50,
    "largest_center_q4_share_pct": 2.40
  },
  "privacy": {
    "personal_identifiers_exported": false,
    "center_identifiers_exported": false
  },
  "cautions": [
    "La banda de ocho o más es mensual y puede estar formada por personas distintas cada mes.",
    "Concentración y frecuencia están relacionadas matemáticamente; el control reduce, pero no elimina, esa dependencia.",
    "La comparación es agregada por centro y no demuestra causalidad."
  ]
}