{
  "methodology": {
    "source": "Basketball-Reference Eastern and Western conference tables",
    "ranking": "Teams sorted by wins within each conference (descending); ties broken by win% then team name \u2014 not official NBA tiebreak order",
    "seeds": "Ranks 6\u201311 = 6th through 11th best record in each conference",
    "mean_win_pct_seed_k": "Average of East and West win% at that seed",
    "gap_a_b": "mean(seed a win%) \u2212 mean(seed b win%) for a < b (better seed minus worse)",
    "headline_gap": "6_7 \u2014 margin between 6 seed and 7 seed (above vs at play-in threshold in current format)",
    "play_in_note": "From 2020\u201321, seeds 7\u201310 enter the play-in; seed 6 avoids it"
  },
  "seasons": [
    {
      "season_label": "1984-85",
      "year_end": 1985,
      "n_teams_east": 11,
      "n_teams_west": 12,
      "gap": 0.0122,
      "mean_win_pct_seed_6": 0.4939,
      "mean_win_pct_seed_7": 0.48171,
      "mean_win_pct_seed_8": 0.43902,
      "mean_win_pct_seed_9": 0.39634,
      "mean_win_pct_seed_10": 0.33537,
      "mean_win_pct_seed_11": 0.32317,
      "gaps": {
        "6_7": 0.0122,
        "6_8": 0.05488,
        "6_9": 0.09756,
        "6_10": 0.15854,
        "6_11": 0.17073,
        "7_8": 0.04268,
        "7_9": 0.08537,
        "7_10": 0.14634,
        "7_11": 0.15854,
        "8_9": 0.04268,
        "8_10": 0.10366,
        "8_11": 0.11585,
        "9_10": 0.06098,
        "9_11": 0.07317,
        "10_11": 0.0122
      }
    },
    {
      "season_label": "1985-86",
      "year_end": 1986,
      "n_teams_east": 11,
      "n_teams_west": 12,
      "gap": 0.01829,
      "mean_win_pct_seed_6": 0.48171,
      "mean_win_pct_seed_7": 0.46341,
      "mean_win_pct_seed_8": 0.39634,
      "mean_win_pct_seed_9": 0.37195,
      "mean_win_pct_seed_10": 0.35366,
      "mean_win_pct_seed_11": 0.32927,
      "gaps": {
        "6_7": 0.01829,
        "6_8": 0.08537,
        "6_9": 0.10976,
        "6_10": 0.12805,
        "6_11": 0.15244,
        "7_8": 0.06707,
        "7_9": 0.09146,
        "7_10": 0.10976,
        "7_11": 0.13415,
        "8_9": 0.02439,
        "8_10": 0.04268,
        "8_11": 0.06707,
        "9_10": 0.01829,
        "9_11": 0.04268,
        "10_11": 0.02439
      }
    },
    {
      "season_label": "1986-87",
      "year_end": 1987,
      "n_teams_east": 11,
      "n_teams_west": 12,
      "gap": 0.02439,
      "mean_win_pct_seed_6": 0.5122,
      "mean_win_pct_seed_7": 0.4878,
      "mean_win_pct_seed_8": 0.46951,
      "mean_win_pct_seed_9": 0.40854,
      "mean_win_pct_seed_10": 0.32317,
      "mean_win_pct_seed_11": 0.31707,
      "gaps": {
        "6_7": 0.02439,
        "6_8": 0.04268,
        "6_9": 0.10366,
        "6_10": 0.18902,
        "6_11": 0.19512,
        "7_8": 0.01829,
        "7_9": 0.07927,
        "7_10": 0.16463,
        "7_11": 0.17073,
        "8_9": 0.06098,
        "8_10": 0.14634,
        "8_11": 0.15244,
        "9_10": 0.08537,
        "9_11": 0.09146,
        "10_11": 0.0061
      }
    },
    {
      "season_label": "1987-88",
      "year_end": 1988,
      "n_teams_east": 11,
      "n_teams_west": 12,
      "gap": 0.03659,
      "mean_win_pct_seed_6": 0.53659,
      "mean_win_pct_seed_7": 0.5,
      "mean_win_pct_seed_8": 0.42073,
      "mean_win_pct_seed_9": 0.40244,
      "mean_win_pct_seed_10": 0.36585,
      "mean_win_pct_seed_11": 0.2378,
      "gaps": {
        "6_7": 0.03659,
        "6_8": 0.11585,
        "6_9": 0.13415,
        "6_10": 0.17073,
        "6_11": 0.29878,
        "7_8": 0.07927,
        "7_9": 0.09756,
        "7_10": 0.13415,
        "7_11": 0.2622,
        "8_9": 0.01829,
        "8_10": 0.05488,
        "8_11": 0.18293,
        "9_10": 0.03659,
        "9_11": 0.16463,
        "10_11": 0.12805
      }
    },
    {
      "season_label": "1988-89",
      "year_end": 1989,
      "n_teams_east": 12,
      "n_teams_west": 13,
      "gap": 0.0122,
      "mean_win_pct_seed_6": 0.55488,
      "mean_win_pct_seed_7": 0.54268,
      "mean_win_pct_seed_8": 0.4939,
      "mean_win_pct_seed_9": 0.47561,
      "mean_win_pct_seed_10": 0.33537,
      "mean_win_pct_seed_11": 0.28659,
      "gaps": {
        "6_7": 0.0122,
        "6_8": 0.06098,
        "6_9": 0.07927,
        "6_10": 0.21951,
        "6_11": 0.26829,
        "7_8": 0.04878,
        "7_9": 0.06707,
        "7_10": 0.20732,
        "7_11": 0.2561,
        "8_9": 0.01829,
        "8_10": 0.15854,
        "8_11": 0.20732,
        "9_10": 0.14024,
        "9_11": 0.18902,
        "10_11": 0.04878
      }
    },
    {
      "season_label": "1989-90",
      "year_end": 1990,
      "n_teams_east": 13,
      "n_teams_west": 14,
      "gap": 0.03659,
      "mean_win_pct_seed_6": 0.55488,
      "mean_win_pct_seed_7": 0.51829,
      "mean_win_pct_seed_8": 0.5061,
      "mean_win_pct_seed_9": 0.5,
      "mean_win_pct_seed_10": 0.41463,
      "mean_win_pct_seed_11": 0.29268,
      "gaps": {
        "6_7": 0.03659,
        "6_8": 0.04878,
        "6_9": 0.05488,
        "6_10": 0.14024,
        "6_11": 0.2622,
        "7_8": 0.0122,
        "7_9": 0.01829,
        "7_10": 0.10366,
        "7_11": 0.22561,
        "8_9": 0.0061,
        "8_10": 0.09146,
        "8_11": 0.21341,
        "9_10": 0.08537,
        "9_11": 0.20732,
        "10_11": 0.12195
      }
    },
    {
      "season_label": "1990-91",
      "year_end": 1991,
      "n_teams_east": 13,
      "n_teams_west": 14,
      "gap": 0.06098,
      "mean_win_pct_seed_6": 0.57927,
      "mean_win_pct_seed_7": 0.51829,
      "mean_win_pct_seed_8": 0.4878,
      "mean_win_pct_seed_9": 0.39024,
      "mean_win_pct_seed_10": 0.37195,
      "mean_win_pct_seed_11": 0.33537,
      "gaps": {
        "6_7": 0.06098,
        "6_8": 0.09146,
        "6_9": 0.18902,
        "6_10": 0.20732,
        "6_11": 0.2439,
        "7_8": 0.03049,
        "7_9": 0.12805,
        "7_10": 0.14634,
        "7_11": 0.18293,
        "8_9": 0.09756,
        "8_10": 0.11585,
        "8_11": 0.15244,
        "9_10": 0.01829,
        "9_11": 0.05488,
        "10_11": 0.03659
      }
    },
    {
      "season_label": "1991-92",
      "year_end": 1992,
      "n_teams_east": 14,
      "n_teams_west": 13,
      "gap": 0.0122,
      "mean_win_pct_seed_6": 0.53049,
      "mean_win_pct_seed_7": 0.51829,
      "mean_win_pct_seed_8": 0.4939,
      "mean_win_pct_seed_9": 0.4878,
      "mean_win_pct_seed_10": 0.39024,
      "mean_win_pct_seed_11": 0.33537,
      "gaps": {
        "6_7": 0.0122,
        "6_8": 0.03659,
        "6_9": 0.04268,
        "6_10": 0.14024,
        "6_11": 0.19512,
        "7_8": 0.02439,
        "7_9": 0.03049,
        "7_10": 0.12805,
        "7_11": 0.18293,
        "8_9": 0.0061,
        "8_10": 0.10366,
        "8_11": 0.15854,
        "9_10": 0.09756,
        "9_11": 0.15244,
        "10_11": 0.05488
      }
    },
    {
      "season_label": "1992-93",
      "year_end": 1993,
      "n_teams_east": 14,
      "n_teams_west": 13,
      "gap": 0.03659,
      "mean_win_pct_seed_6": 0.54878,
      "mean_win_pct_seed_7": 0.5122,
      "mean_win_pct_seed_8": 0.4878,
      "mean_win_pct_seed_9": 0.46951,
      "mean_win_pct_seed_10": 0.45122,
      "mean_win_pct_seed_11": 0.37195,
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        "6_8": 0.06098,
        "6_9": 0.07927,
        "6_10": 0.09756,
        "6_11": 0.17683,
        "7_8": 0.02439,
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        "7_10": 0.06098,
        "7_11": 0.14024,
        "8_9": 0.01829,
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        "9_10": 0.01829,
        "9_11": 0.09756,
        "10_11": 0.07927
      }
    },
    {
      "season_label": "1993-94",
      "year_end": 1994,
      "n_teams_east": 14,
      "n_teams_west": 13,
      "gap": 0.03049,
      "mean_win_pct_seed_6": 0.59146,
      "mean_win_pct_seed_7": 0.56098,
      "mean_win_pct_seed_8": 0.5122,
      "mean_win_pct_seed_9": 0.45122,
      "mean_win_pct_seed_10": 0.36585,
      "mean_win_pct_seed_11": 0.31707,
      "gaps": {
        "6_7": 0.03049,
        "6_8": 0.07927,
        "6_9": 0.14024,
        "6_10": 0.22561,
        "6_11": 0.27439,
        "7_8": 0.04878,
        "7_9": 0.10976,
        "7_10": 0.19512,
        "7_11": 0.2439,
        "8_9": 0.06098,
        "8_10": 0.14634,
        "8_11": 0.19512,
        "9_10": 0.08537,
        "9_11": 0.13415,
        "10_11": 0.04878
      }
    },
    {
      "season_label": "1994-95",
      "year_end": 1995,
      "n_teams_east": 14,
      "n_teams_west": 13,
      "gap": 0.02439,
      "mean_win_pct_seed_6": 0.54878,
      "mean_win_pct_seed_7": 0.52439,
      "mean_win_pct_seed_8": 0.46341,
      "mean_win_pct_seed_9": 0.44512,
      "mean_win_pct_seed_10": 0.41463,
      "mean_win_pct_seed_11": 0.34146,
      "gaps": {
        "6_7": 0.02439,
        "6_8": 0.08537,
        "6_9": 0.10366,
        "6_10": 0.13415,
        "6_11": 0.20732,
        "7_8": 0.06098,
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        "7_10": 0.10976,
        "7_11": 0.18293,
        "8_9": 0.01829,
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        "8_11": 0.12195,
        "9_10": 0.03049,
        "9_11": 0.10366,
        "10_11": 0.07317
      }
    },
    {
      "season_label": "1995-96",
      "year_end": 1996,
      "n_teams_east": 15,
      "n_teams_west": 14,
      "gap": 0.01829,
      "mean_win_pct_seed_6": 0.54878,
      "mean_win_pct_seed_7": 0.53049,
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      "mean_win_pct_seed_9": 0.46951,
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      }
    },
    {
      "season_label": "1996-97",
      "year_end": 1997,
      "n_teams_east": 15,
      "n_teams_west": 14,
      "gap": 0.05488,
      "mean_win_pct_seed_6": 0.57317,
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      "mean_win_pct_seed_10": 0.42073,
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      }
    },
    {
      "season_label": "1997-98",
      "year_end": 1998,
      "n_teams_east": 15,
      "n_teams_west": 14,
      "gap": 0.03049,
      "mean_win_pct_seed_6": 0.56707,
      "mean_win_pct_seed_7": 0.53659,
      "mean_win_pct_seed_8": 0.5122,
      "mean_win_pct_seed_9": 0.42073,
      "mean_win_pct_seed_10": 0.37195,
      "mean_win_pct_seed_11": 0.34146,
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        "6_7": 0.03049,
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        "6_10": 0.19512,
        "6_11": 0.22561,
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    },
    {
      "season_label": "1998-99",
      "year_end": 1999,
      "n_teams_east": 15,
      "n_teams_west": 14,
      "gap": 0.0,
      "mean_win_pct_seed_6": 0.55,
      "mean_win_pct_seed_7": 0.55,
      "mean_win_pct_seed_8": 0.52,
      "mean_win_pct_seed_9": 0.51,
      "mean_win_pct_seed_10": 0.44,
      "mean_win_pct_seed_11": 0.41,
      "gaps": {
        "6_7": 0.0,
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        "6_9": 0.04,
        "6_10": 0.11,
        "6_11": 0.14,
        "7_8": 0.03,
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        "7_10": 0.11,
        "7_11": 0.14,
        "8_9": 0.01,
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        "8_11": 0.11,
        "9_10": 0.07,
        "9_11": 0.1,
        "10_11": 0.03
      }
    },
    {
      "season_label": "1999-00",
      "year_end": 2000,
      "n_teams_east": 15,
      "n_teams_west": 14,
      "gap": 0.04878,
      "mean_win_pct_seed_6": 0.57927,
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      "mean_win_pct_seed_9": 0.4939,
      "mean_win_pct_seed_10": 0.42683,
      "mean_win_pct_seed_11": 0.40244,
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        "6_11": 0.17683,
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      }
    },
    {
      "season_label": "2000-01",
      "year_end": 2001,
      "n_teams_east": 15,
      "n_teams_west": 14,
      "gap": 0.02439,
      "mean_win_pct_seed_6": 0.59146,
      "mean_win_pct_seed_7": 0.56707,
      "mean_win_pct_seed_8": 0.53659,
      "mean_win_pct_seed_9": 0.4939,
      "mean_win_pct_seed_10": 0.46341,
      "mean_win_pct_seed_11": 0.42683,
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        "6_7": 0.02439,
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        "6_11": 0.16463,
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    },
    {
      "season_label": "2001-02",
      "year_end": 2002,
      "n_teams_east": 15,
      "n_teams_west": 14,
      "gap": 0.03049,
      "mean_win_pct_seed_6": 0.56098,
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      "mean_win_pct_seed_9": 0.4878,
      "mean_win_pct_seed_10": 0.44512,
      "mean_win_pct_seed_11": 0.39024,
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        "6_11": 0.17073,
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    },
    {
      "season_label": "2002-03",
      "year_end": 2003,
      "n_teams_east": 15,
      "n_teams_west": 14,
      "gap": 0.03049,
      "mean_win_pct_seed_6": 0.57317,
      "mean_win_pct_seed_7": 0.54268,
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      "mean_win_pct_seed_9": 0.4878,
      "mean_win_pct_seed_10": 0.46951,
      "mean_win_pct_seed_11": 0.44512,
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        "6_11": 0.12805,
        "7_8": 0.01829,
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        "10_11": 0.02439
      }
    },
    {
      "season_label": "2003-04",
      "year_end": 2004,
      "n_teams_east": 15,
      "n_teams_west": 14,
      "gap": 0.04268,
      "mean_win_pct_seed_6": 0.55488,
      "mean_win_pct_seed_7": 0.5122,
      "mean_win_pct_seed_8": 0.48171,
      "mean_win_pct_seed_9": 0.46951,
      "mean_win_pct_seed_10": 0.45122,
      "mean_win_pct_seed_11": 0.42683,
      "gaps": {
        "6_7": 0.04268,
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      }
    },
    {
      "season_label": "2004-05",
      "year_end": 2005,
      "n_teams_east": 15,
      "n_teams_west": 15,
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}