{
  "studyId": "RSR-002",
  "title": "The Repeat-Block Problem",
  "sourceKind": "official_public_records",
  "period": "2023-07-01 through 2026-06-30",
  "sampleSize": 114934,
  "methodology": [
    "Deduplicated official SPD property-offense records by offense ID.",
    "Normalized published 100-block labels without reconstructing exact addresses.",
    "Ranked valid blocks by recorded offense count."
  ],
  "findings": [
    "The top 10% of valid published blocks accounted for 56.2% of property-offense records.",
    "76.7% of records occurred on blocks with at least five recorded offenses in the study window."
  ],
  "metrics": {
    "acceptedOffenseRecords": 114934,
    "excludedWithoutValidBlock": 1880,
    "distinctBlocks": 19741,
    "topTenPercentRecordShare": 56.2,
    "recordsOnBlocksWithAtLeastFive": 76.7,
    "blocksWithAtLeastFive": 5405,
    "blockShareWithAtLeastFive": 27.38,
    "medianRecordsPerBlock": 2,
    "p90RecordsPerBlock": 11,
    "p95RecordsPerBlock": 21,
    "gini": 0.647,
    "concentrationBands": [
      {
        "topPercent": 1,
        "blockCount": 198,
        "recordCount": 23395,
        "recordShare": 20.36
      },
      {
        "topPercent": 5,
        "blockCount": 988,
        "recordCount": 49665,
        "recordShare": 43.21
      },
      {
        "topPercent": 10,
        "blockCount": 1975,
        "recordCount": 64551,
        "recordShare": 56.16
      },
      {
        "topPercent": 20,
        "blockCount": 3949,
        "recordCount": 80419,
        "recordShare": 69.97
      },
      {
        "topPercent": 50,
        "blockCount": 9871,
        "recordCount": 102273,
        "recordShare": 88.98
      }
    ],
    "lorenz": [
      {
        "blockShare": 0,
        "recordShare": 0
      },
      {
        "blockShare": 5,
        "recordShare": 0.86
      },
      {
        "blockShare": 10,
        "recordShare": 1.72
      },
      {
        "blockShare": 15,
        "recordShare": 2.58
      },
      {
        "blockShare": 20,
        "recordShare": 3.44
      },
      {
        "blockShare": 25,
        "recordShare": 4.29
      },
      {
        "blockShare": 30,
        "recordShare": 5.15
      },
      {
        "blockShare": 35,
        "recordShare": 6.01
      },
      {
        "blockShare": 40,
        "recordShare": 7.58
      },
      {
        "blockShare": 45,
        "recordShare": 9.3
      },
      {
        "blockShare": 50,
        "recordShare": 11.02
      },
      {
        "blockShare": 55,
        "recordShare": 12.94
      },
      {
        "blockShare": 60,
        "recordShare": 15.52
      },
      {
        "blockShare": 65,
        "recordShare": 18.09
      },
      {
        "blockShare": 70,
        "recordShare": 21.52
      },
      {
        "blockShare": 75,
        "recordShare": 25.36
      },
      {
        "blockShare": 80,
        "recordShare": 30.04
      },
      {
        "blockShare": 85,
        "recordShare": 35.89
      },
      {
        "blockShare": 90,
        "recordShare": 43.85
      },
      {
        "blockShare": 95,
        "recordShare": 56.81
      },
      {
        "blockShare": 100,
        "recordShare": 100
      }
    ],
    "offenseSubcategories": [
      {
        "label": "LARCENY-THEFT",
        "count": 69257
      },
      {
        "label": "BURGLARY",
        "count": 24231
      },
      {
        "label": "MOTOR VEHICLE THEFT",
        "count": 20963
      },
      {
        "label": "ARSON",
        "count": 483
      }
    ],
    "neighborhoods": [
      {
        "neighborhood": "QUEEN ANNE",
        "records": 7567,
        "blocks": 1165,
        "topTenPercentRecordShare": 54.57
      },
      {
        "neighborhood": "CAPITOL HILL",
        "records": 7549,
        "blocks": 775,
        "topTenPercentRecordShare": 51.72
      },
      {
        "neighborhood": "SLU/CASCADE",
        "records": 5474,
        "blocks": 565,
        "topTenPercentRecordShare": 55.77
      },
      {
        "neighborhood": "ROOSEVELT/RAVENNA",
        "records": 5460,
        "blocks": 948,
        "topTenPercentRecordShare": 55.7
      },
      {
        "neighborhood": "NORTHGATE",
        "records": 5446,
        "blocks": 878,
        "topTenPercentRecordShare": 60.65
      },
      {
        "neighborhood": "UNIVERSITY",
        "records": 5403,
        "blocks": 561,
        "topTenPercentRecordShare": 57.23
      },
      {
        "neighborhood": "BALLARD SOUTH",
        "records": 5346,
        "blocks": 727,
        "topTenPercentRecordShare": 51.23
      },
      {
        "neighborhood": "DOWNTOWN COMMERCIAL",
        "records": 4315,
        "blocks": 411,
        "topTenPercentRecordShare": 61.14
      },
      {
        "neighborhood": "FIRST HILL",
        "records": 3959,
        "blocks": 426,
        "topTenPercentRecordShare": 57.57
      },
      {
        "neighborhood": "SANDPOINT",
        "records": 3065,
        "blocks": 967,
        "topTenPercentRecordShare": 40.69
      },
      {
        "neighborhood": "CENTRAL AREA/SQUIRE PARK",
        "records": 2960,
        "blocks": 679,
        "topTenPercentRecordShare": 46.49
      },
      {
        "neighborhood": "LAKECITY",
        "records": 2690,
        "blocks": 532,
        "topTenPercentRecordShare": 56.43
      },
      {
        "neighborhood": "FREMONT",
        "records": 2682,
        "blocks": 505,
        "topTenPercentRecordShare": 43.29
      },
      {
        "neighborhood": "BELLTOWN",
        "records": 2549,
        "blocks": 201,
        "topTenPercentRecordShare": 46.92
      },
      {
        "neighborhood": "BALLARD NORTH",
        "records": 2388,
        "blocks": 669,
        "topTenPercentRecordShare": 41.37
      },
      {
        "neighborhood": "ROXHILL/WESTWOOD/ARBOR HEIGHTS",
        "records": 2356,
        "blocks": 326,
        "topTenPercentRecordShare": 71.31
      },
      {
        "neighborhood": "NORTH BEACON HILL",
        "records": 2326,
        "blocks": 512,
        "topTenPercentRecordShare": 49.61
      },
      {
        "neighborhood": "BITTERLAKE",
        "records": 2320,
        "blocks": 389,
        "topTenPercentRecordShare": 61.47
      },
      {
        "neighborhood": "GREENWOOD",
        "records": 2259,
        "blocks": 482,
        "topTenPercentRecordShare": 43.03
      },
      {
        "neighborhood": "SODO",
        "records": 2222,
        "blocks": 290,
        "topTenPercentRecordShare": 58.64
      },
      {
        "neighborhood": "MAGNOLIA",
        "records": 2207,
        "blocks": 593,
        "topTenPercentRecordShare": 45.13
      },
      {
        "neighborhood": "WALLINGFORD",
        "records": 2197,
        "blocks": 629,
        "topTenPercentRecordShare": 43.24
      },
      {
        "neighborhood": "MADRONA/LESCHI",
        "records": 2147,
        "blocks": 460,
        "topTenPercentRecordShare": 59.52
      },
      {
        "neighborhood": "MOUNT BAKER",
        "records": 1964,
        "blocks": 339,
        "topTenPercentRecordShare": 55.35
      },
      {
        "neighborhood": "ALASKA JUNCTION",
        "records": 1955,
        "blocks": 333,
        "topTenPercentRecordShare": 57.08
      },
      {
        "neighborhood": "CHINATOWN/INTERNATIONAL DISTRICT",
        "records": 1866,
        "blocks": 224,
        "topTenPercentRecordShare": 52.36
      },
      {
        "neighborhood": "GEORGETOWN",
        "records": 1458,
        "blocks": 301,
        "topTenPercentRecordShare": 44.03
      },
      {
        "neighborhood": "JUDKINS PARK/NORTH BEACON HILL",
        "records": 1303,
        "blocks": 176,
        "topTenPercentRecordShare": 54.72
      },
      {
        "neighborhood": "PIONEER SQUARE",
        "records": 1266,
        "blocks": 144,
        "topTenPercentRecordShare": 53.16
      },
      {
        "neighborhood": "NORTH ADMIRAL",
        "records": 1226,
        "blocks": 318,
        "topTenPercentRecordShare": 48.86
      },
      {
        "neighborhood": "RAINIER BEACH",
        "records": 1184,
        "blocks": 136,
        "topTenPercentRecordShare": 70.44
      },
      {
        "neighborhood": "MILLER PARK",
        "records": 1153,
        "blocks": 248,
        "topTenPercentRecordShare": 43.8
      },
      {
        "neighborhood": "BRIGHTON/DUNLAP",
        "records": 1145,
        "blocks": 266,
        "topTenPercentRecordShare": 47.77
      },
      {
        "neighborhood": "HIGHLAND PARK",
        "records": 1069,
        "blocks": 254,
        "topTenPercentRecordShare": 44.62
      },
      {
        "neighborhood": "MORGAN",
        "records": 1053,
        "blocks": 313,
        "topTenPercentRecordShare": 38.56
      },
      {
        "neighborhood": "PHINNEY RIDGE",
        "records": 1051,
        "blocks": 351,
        "topTenPercentRecordShare": 34.06
      },
      {
        "neighborhood": "MONTLAKE/PORTAGE BAY",
        "records": 983,
        "blocks": 260,
        "topTenPercentRecordShare": 41.91
      },
      {
        "neighborhood": "EASTLAKE - WEST",
        "records": 932,
        "blocks": 132,
        "topTenPercentRecordShare": 48.07
      },
      {
        "neighborhood": "MID BEACON HILL",
        "records": 890,
        "blocks": 330,
        "topTenPercentRecordShare": 34.94
      },
      {
        "neighborhood": "COLUMBIA CITY",
        "records": 822,
        "blocks": 153,
        "topTenPercentRecordShare": 54.14
      },
      {
        "neighborhood": "NORTH DELRIDGE",
        "records": 763,
        "blocks": 156,
        "topTenPercentRecordShare": 50.85
      },
      {
        "neighborhood": "HIGH POINT",
        "records": 753,
        "blocks": 153,
        "topTenPercentRecordShare": 51.79
      },
      {
        "neighborhood": "RAINIER VIEW",
        "records": 726,
        "blocks": 235,
        "topTenPercentRecordShare": 43.8
      },
      {
        "neighborhood": "CLAREMONT/RAINIER VISTA",
        "records": 631,
        "blocks": 142,
        "topTenPercentRecordShare": 39.78
      },
      {
        "neighborhood": "LAKEWOOD/SEWARD PARK",
        "records": 599,
        "blocks": 236,
        "topTenPercentRecordShare": 36.73
      },
      {
        "neighborhood": "NEW HOLLY",
        "records": 542,
        "blocks": 106,
        "topTenPercentRecordShare": 57.93
      },
      {
        "neighborhood": "SOUTH PARK",
        "records": 528,
        "blocks": 172,
        "topTenPercentRecordShare": 36.36
      },
      {
        "neighborhood": "ALKI",
        "records": 501,
        "blocks": 153,
        "topTenPercentRecordShare": 34.33
      },
      {
        "neighborhood": "SOUTH DELRIDGE",
        "records": 487,
        "blocks": 48,
        "topTenPercentRecordShare": 52.57
      },
      {
        "neighborhood": "GENESEE",
        "records": 462,
        "blocks": 85,
        "topTenPercentRecordShare": 70.35
      },
      {
        "neighborhood": "MADISON PARK",
        "records": 447,
        "blocks": 160,
        "topTenPercentRecordShare": 39.6
      },
      {
        "neighborhood": "HILLMAN CITY",
        "records": 430,
        "blocks": 118,
        "topTenPercentRecordShare": 46.51
      },
      {
        "neighborhood": "UNKNOWN",
        "records": 407,
        "blocks": 281,
        "topTenPercentRecordShare": 32.92
      },
      {
        "neighborhood": "FAUNTLEROY SW",
        "records": 402,
        "blocks": 165,
        "topTenPercentRecordShare": 39.55
      },
      {
        "neighborhood": "SOUTH BEACON HILL",
        "records": 314,
        "blocks": 118,
        "topTenPercentRecordShare": 30.57
      },
      {
        "neighborhood": "-",
        "records": 267,
        "blocks": 206,
        "topTenPercentRecordShare": 26.59
      },
      {
        "neighborhood": "EASTLAKE - EAST",
        "records": 246,
        "blocks": 60,
        "topTenPercentRecordShare": 42.28
      }
    ],
    "sensitivity": {
      "recencyWeighting": {
        "halfLifeDays": 365,
        "topTenPercentWeightedShare": 57.43
      },
      "normalization": {
        "normalizedDistinctBlocks": 19741,
        "trimmedCaseSensitiveDistinctBlocks": 19743,
        "excludedMissingOrRedacted": 1880
      }
    }
  },
  "limitations": [
    "This measures concentration in published SPD offense records, not victimization risk.",
    "SPD locations are blurred to the 100 block and some locations are redacted."
  ]
}