{
  "ambiguitySensitivity": {
    "excludedMatchedRecordCount": 47,
    "headline": {
      "count": 1034,
      "decreased": 0,
      "increased": 1011,
      "medianChange": 5568.5,
      "medianPercentageChange": 16.584030930301786,
      "p10Change": 1024,
      "p90Change": 24071,
      "unchanged": 23
    },
    "overall": {
      "count": 9183,
      "decreased": 14,
      "increased": 7231,
      "unchanged": 1938
    }
  },
  "bySeatType": [
    {
      "count": 1436,
      "decreased": 3,
      "increased": 1234,
      "medianChange": 800.5,
      "medianPercentageChange": 15.504955662329365,
      "p10Change": 0,
      "p90Change": 4170,
      "rankBasis": "category_rank",
      "seatType": "EWS",
      "unchanged": 199
    },
    {
      "count": 111,
      "decreased": 0,
      "increased": 48,
      "medianChange": 0,
      "medianPercentageChange": 0.0,
      "p10Change": 0,
      "p90Change": 91,
      "rankBasis": "pwd_rank_within_category",
      "seatType": "EWS (PwD)",
      "unchanged": 63
    },
    {
      "count": 1673,
      "decreased": 2,
      "increased": 1510,
      "medianChange": 2063,
      "medianPercentageChange": 14.85543369890329,
      "p10Change": 10,
      "p90Change": 8863,
      "rankBasis": "category_rank",
      "seatType": "OBC-NCL",
      "unchanged": 161
    },
    {
      "count": 382,
      "decreased": 0,
      "increased": 232,
      "medianChange": 73.5,
      "medianPercentageChange": 15.03846853637616,
      "p10Change": 0,
      "p90Change": 589,
      "rankBasis": "pwd_rank_within_category",
      "seatType": "OBC-NCL (PwD)",
      "unchanged": 150
    },
    {
      "count": 1857,
      "decreased": 1,
      "increased": 1715,
      "medianChange": 4784,
      "medianPercentageChange": 14.603174603174603,
      "p10Change": 389,
      "p90Change": 20231,
      "rankBasis": "crl",
      "seatType": "OPEN",
      "unchanged": 141
    },
    {
      "count": 627,
      "decreased": 4,
      "increased": 304,
      "medianChange": 0,
      "medianPercentageChange": 0.0,
      "p10Change": 0,
      "p90Change": 1058,
      "rankBasis": "pwd_rank_within_open",
      "seatType": "OPEN (PwD)",
      "unchanged": 319
    },
    {
      "count": 1608,
      "decreased": 0,
      "increased": 1286,
      "medianChange": 666.0,
      "medianPercentageChange": 11.028327387870682,
      "p10Change": 0,
      "p90Change": 2964,
      "rankBasis": "category_rank",
      "seatType": "SC",
      "unchanged": 322
    },
    {
      "count": 111,
      "decreased": 1,
      "increased": 32,
      "medianChange": 0,
      "medianPercentageChange": 0.0,
      "p10Change": 0,
      "p90Change": 65,
      "rankBasis": "pwd_rank_within_category",
      "seatType": "SC (PwD)",
      "unchanged": 78
    },
    {
      "count": 1387,
      "decreased": 3,
      "increased": 897,
      "medianChange": 195,
      "medianPercentageChange": 7.8101644245142,
      "p10Change": 0,
      "p90Change": 1723,
      "rankBasis": "category_rank",
      "seatType": "ST",
      "unchanged": 487
    },
    {
      "count": 38,
      "decreased": 0,
      "increased": 10,
      "medianChange": 0.0,
      "medianPercentageChange": 0.0,
      "p10Change": 0,
      "p90Change": 48,
      "rankBasis": "pwd_rank_within_category",
      "seatType": "ST (PwD)",
      "unchanged": 28
    }
  ],
  "distribution": {
    "bytes": 2962838,
    "contentUrl": "/data/josaa_2026_round1_to_5_movement.csv",
    "encodingFormat": "text/csv",
    "sha256": "8607a1a62f054f1385c792759fce7e63d1ca861b5aa17a95dac95db72bbd8f28"
  },
  "exclusions": {
    "ambiguousMatchedRecordCount": 47,
    "architecturePlanningRows": 1353,
    "intermediateOnlyRecordCount": 0,
    "matchedMissingIntermediateCount": 1,
    "otherYearRows": 0,
    "round1OnlyRecordCount": 274,
    "round5OnlyRecordCount": 0,
    "unmappedRows": 321
  },
  "headline": {
    "byQuota": [
      {
        "count": 328,
        "decreased": 0,
        "increased": 325,
        "medianChange": 10554.0,
        "medianPercentageChange": 21.244213111014417,
        "p10Change": 3095,
        "p90Change": 26935,
        "quota": "AI",
        "unchanged": 3
      },
      {
        "count": 362,
        "decreased": 0,
        "increased": 345,
        "medianChange": 3943.5,
        "medianPercentageChange": 12.712530149430183,
        "p10Change": 561,
        "p90Change": 43110,
        "quota": "HS",
        "unchanged": 17
      },
      {
        "count": 353,
        "decreased": 0,
        "increased": 350,
        "medianChange": 3734,
        "medianPercentageChange": 15.46738059758038,
        "p10Change": 882,
        "p90Change": 9099,
        "quota": "OS",
        "unchanged": 3
      }
    ],
    "count": 1043,
    "decreased": 0,
    "genderPool": "gender_neutral",
    "increased": 1020,
    "medianChange": 5539,
    "medianPercentageChange": 16.5463291478191,
    "p10Change": 1050,
    "p90Change": 24071,
    "quotas": [
      "AI",
      "HS",
      "OS"
    ],
    "rankBasis": "crl",
    "seatType": "OPEN",
    "unchanged": 23
  },
  "identityFields": [
    "source_year",
    "institute_code",
    "academic_program_name",
    "quota",
    "seat_type",
    "gender_pool",
    "rank_basis"
  ],
  "limitations": [
    "This is descriptive evidence from completed JoSAA 2026 rounds, not an admission probability, future cutoff forecast or recommendation to wait for a later round.",
    "Do not add the median rank change or percentage to an individual predictor result. Eligibility, rank list, choices and available seats remain separate considerations.",
    "Records are not weighted by seats, applicants or institutions. Quota and seat-type groups contain different programme and institution mixes; differences are not causal effects.",
    "The matched endpoint cohort excludes records absent from either endpoint. A missing source row does not establish zero seats, a zero cutoff or the reason for its absence.",
    "Eight unmapped official institute identities, Architecture, Planning, IITs and CSAB are outside this release. Other published degree labels remain intact; do not describe the entire cohort as B.E./B.Tech only.",
    "Ambiguous internal programme codes are retained only under stable exact official labels with unique observations. A sensitivity calculation separately excludes those records.",
    "The public movement CSV permits recalculation of its published summaries. Full source-to-output reproduction additionally requires the normalized source CSV, source manifest and five raw HTML snapshots; hashes verify those files but do not supply them."
  ],
  "methodology": [
    "Validate the normalized input and all five raw official source snapshots against their SHA-256 hashes before publication.",
    "Apply the existing mapped-institute and non-Architecture/non-Planning selection; retain exact official programme labels rather than guessing ambiguous programme codes.",
    "Join rounds by year, institute code, exact programme label, quota, seat type, gender pool and rank basis. Reject duplicate observations and inconsistent rank semantics.",
    "Change equals round-5 closing rank minus round-1 closing rank. Positive means the numerical closing rank increased, not that an applicant was admitted.",
    "Percentage change is calculated separately for each matched record as 100 times change divided by its round-1 closing rank.",
    "Each matched record has equal weight. Median is the middle value, or the arithmetic mean of the two middle values for an even count. Percentage summaries are medians of individual percentage changes.",
    "10th and 90th percentiles use nearest-rank order statistics: sorted value at one-based ceiling(p times record count). Empty cohorts return null statistics.",
    "Summarize magnitude only within a seat-type/rank-list lane. Overall counts describe direction only. The headline additionally fixes OPEN, gender-neutral and AI/HS/OS quotas.",
    "Retain absent rounds as JSON null or empty CSV fields. Exclude missing endpoint records from movement statistics; do not fill forward. Keep genuine negative movements."
  ],
  "missingIntermediateRecords": [
    {
      "change": 0,
      "closingRanks": {
        "1": 346,
        "2": null,
        "3": 346,
        "4": 346,
        "5": 346
      },
      "genderPool": "gender_neutral",
      "institute": "Indian institute of information technology, Raichur, Karnataka",
      "instituteCode": "326",
      "instituteType": "IIIT",
      "missingRounds": [
        2
      ],
      "observationStatus": "matched",
      "percentageChange": 0.0,
      "programme": "Computer Science and Engineering (4 Years, Bachelor of Technology)",
      "programmeIdentityStatus": "exact",
      "quota": "AI",
      "rankBasis": "pwd_rank_within_category",
      "seatType": "SC (PwD)",
      "sourceUrl": "https://josaa.admissions.nic.in/Applicant/SeatAllotmentResult/CurrentORCR.aspx"
    }
  ],
  "name": "JoSAA 2026 Round 1 to 5 Closing-Rank Movement: Mapped NIT+ Cohort",
  "negativeCounterexample": {
    "change": -2960,
    "closingRanks": {
      "1": 42645,
      "2": 39685,
      "3": 39685,
      "4": 39685,
      "5": 39685
    },
    "genderPool": "female_only",
    "institute": "National Institute of Technology Durgapur",
    "instituteCode": "208",
    "instituteType": "NIT",
    "missingRounds": [],
    "observationStatus": "matched",
    "percentageChange": -6.9410247391253375,
    "programme": "Bio Technology (4 Years, Bachelor of Technology)",
    "programmeIdentityStatus": "exact",
    "quota": "OS",
    "rankBasis": "crl",
    "seatType": "OPEN",
    "sourceUrl": "https://josaa.admissions.nic.in/Applicant/SeatAllotmentResult/CurrentORCR.aspx"
  },
  "overall": {
    "count": 9230,
    "decreased": 14,
    "increased": 7268,
    "unchanged": 1948
  },
  "publishedAt": "2026-09-10",
  "recordUnit": "One exact institute-programme-quota-seat-type-gender-pool-rank-list record; not seats, colleges, candidates or admission probabilities.",
  "schemaVersion": 1,
  "scope": {
    "instituteCount": 103,
    "matchedRecordCount": 9230,
    "programmeLabelCount": 180,
    "recordCount": 9504,
    "roundRowCounts": {
      "1": 9504,
      "2": 9319,
      "3": 9272,
      "4": 9253,
      "5": 9230
    },
    "rounds": [
      1,
      2,
      3,
      4,
      5
    ],
    "selection": "Mapped JEE Main Paper 1 rank-based NIT+ programmes, including integrated science and design; exclude Architecture and Planning and retain exact official programme labels.",
    "year": 2026
  },
  "sources": {
    "authority": "JoSAA",
    "normalizedSha256": "c21a230e28792a06bb01ccc461fa8e424c8638eb477f9b117c20955fb473e6b9",
    "rawSnapshots": [
      {
        "bytes": 16010662,
        "round": 1,
        "sha256": "5e80b5a0cdc2df61ec1609a6c68cc7feef57d44148968c038a527df8808b70e7"
      },
      {
        "bytes": 15718228,
        "round": 2,
        "sha256": "d449c0b15a76c5a3dd3b1d2107568558b56482a6b5cf53a710dbaf1ae1c257bc"
      },
      {
        "bytes": 15648180,
        "round": 3,
        "sha256": "f9381b0339febe89e41a1a6e6594461a449906553fc351243bc843d18355ef28"
      },
      {
        "bytes": 15622965,
        "round": 4,
        "sha256": "70ff0d66acf6b3de38a19d950e7625447af1297de40dc040d78c36bade400909"
      },
      {
        "bytes": 15584939,
        "round": 5,
        "sha256": "38722c1a1abfac443fbeb13e63d6928ca1ea5e952dc1d298434ac96941dbf113"
      }
    ],
    "sourceDataUrl": "https://josaa.admissions.nic.in/Applicant/SeatAllotmentResult/CurrentORCR.aspx",
    "sourceLandingUrl": "https://josaa.nic.in/or-cr/",
    "sourceManifestSha256": "979343901855f9f4027f555812724da4c4a62febe628afff8b2870e7124fa37f"
  }
}