{
 "country": "PT",
 "country_iso3": "PRT",
 "label": {
  "de": "Portugal",
  "en": "Portugal"
 },
 "note": {
  "de": "Portugal zieht seine Stichprobe in allen Zyklen nach NUTS3-Regionen; alle 25 Regionen sind durchgaengig besetzt. Eine offizielle REGION-Variable fuehrt nur das File 2015, und dort steht Portugal als Ganzes — die Regionswerte sind also nicht von der OECD adjudiziert, sondern aus den Ziehungsschichten gerechnet. Kleine Regionen kommen auf wenige hundert Schueler, ihre Standardfehler sind entsprechend gross.",
  "en": "Portugal draws its sample by NUTS3 region in every cycle, and all 25 regions are populated throughout. An official REGION variable exists only in the 2015 file, where Portugal appears as a whole — so these regional figures are computed from the sampling strata rather than adjudicated by the OECD. Small regions hold a few hundred students, so their standard errors are large."
 },
 "generated": "2026-09-08",
 "min_students": 15,
 "cycles": [
  2015,
  2018,
  2022,
  2025
 ],
 "region_source": {
  "2015": "stratum",
  "2018": "stratum",
  "2022": "stratum",
  "2025": "stratum"
 },
 "source": "OECD PISA Scientific Use Files (Student questionnaire, 2015, 2018, 2022, 2025). Eigene Berechnung: Mittelwerte ueber alle Plausible Values, Standardfehler per Balanced Repeated Replication (Fay 0.5, 80 Replikate). Erzeugt mit scripts/compute_pisa_regional_migration.py",
 "regions": {
  "PT111": {
   "de": "Alto Minho",
   "en": "Alto Minho",
   "adjudicated": false,
   "residual": false
  },
  "PT112": {
   "de": "Cávado",
   "en": "Cávado",
   "adjudicated": false,
   "residual": false
  },
  "PT119": {
   "de": "Ave",
   "en": "Ave",
   "adjudicated": false,
   "residual": false
  },
  "PT11A": {
   "de": "Metropolregion Porto",
   "en": "Porto Metropolitan Area",
   "adjudicated": false,
   "residual": false
  },
  "PT11B": {
   "de": "Alto Tâmega",
   "en": "Alto Tâmega",
   "adjudicated": false,
   "residual": false
  },
  "PT11C": {
   "de": "Tâmega e Sousa",
   "en": "Tâmega e Sousa",
   "adjudicated": false,
   "residual": false
  },
  "PT11D": {
   "de": "Douro",
   "en": "Douro",
   "adjudicated": false,
   "residual": false
  },
  "PT11E": {
   "de": "Terras de Trás-os-Montes",
   "en": "Terras de Trás-os-Montes",
   "adjudicated": false,
   "residual": false
  },
  "PT150": {
   "de": "Algarve",
   "en": "Algarve",
   "adjudicated": false,
   "residual": false
  },
  "PT16B": {
   "de": "Oeste",
   "en": "Oeste",
   "adjudicated": false,
   "residual": false
  },
  "PT16D": {
   "de": "Região de Aveiro",
   "en": "Região de Aveiro",
   "adjudicated": false,
   "residual": false
  },
  "PT16E": {
   "de": "Região de Coimbra",
   "en": "Região de Coimbra",
   "adjudicated": false,
   "residual": false
  },
  "PT16F": {
   "de": "Região de Leiria",
   "en": "Região de Leiria",
   "adjudicated": false,
   "residual": false
  },
  "PT16G": {
   "de": "Viseu Dão Lafões",
   "en": "Viseu Dão Lafões",
   "adjudicated": false,
   "residual": false
  },
  "PT16H": {
   "de": "Beira Baixa",
   "en": "Beira Baixa",
   "adjudicated": false,
   "residual": false
  },
  "PT16I": {
   "de": "Médio Tejo",
   "en": "Médio Tejo",
   "adjudicated": false,
   "residual": false
  },
  "PT16J": {
   "de": "Beiras e Serra da Estrela",
   "en": "Beiras e Serra da Estrela",
   "adjudicated": false,
   "residual": false
  },
  "PT170": {
   "de": "Metropolregion Lissabon",
   "en": "Lisbon Metropolitan Area",
   "adjudicated": false,
   "residual": false
  },
  "PT181": {
   "de": "Alentejo Litoral",
   "en": "Alentejo Litoral",
   "adjudicated": false,
   "residual": false
  },
  "PT184": {
   "de": "Baixo Alentejo",
   "en": "Baixo Alentejo",
   "adjudicated": false,
   "residual": false
  },
  "PT185": {
   "de": "Lezíria do Tejo",
   "en": "Lezíria do Tejo",
   "adjudicated": false,
   "residual": false
  },
  "PT186": {
   "de": "Alto Alentejo",
   "en": "Alto Alentejo",
   "adjudicated": false,
   "residual": false
  },
  "PT187": {
   "de": "Alentejo Central",
   "en": "Alentejo Central",
   "adjudicated": false,
   "residual": false
  },
  "PT200": {
   "de": "Azoren",
   "en": "Azores",
   "adjudicated": true,
   "residual": false
  },
  "PT300": {
   "de": "Madeira",
   "en": "Madeira",
   "adjudicated": false,
   "residual": false
  }
 },
 "rows": [
  {
   "year": 2015,
   "region": "PT111",
   "group": "overall",
   "students": 162,
   "weighted_share": 100.0,
   "math": 517.7,
   "math_se": 11.0,
   "reading": 503.5,
   "reading_se": 16.8,
   "science": 516.9,
   "science_se": 15.3,
   "escs": -0.28,
   "home_test_lang_share": 96.4
  },
  {
   "year": 2015,
   "region": "PT111",
   "group": "native",
   "students": 153,
   "weighted_share": 93.51,
   "math": 518.3,
   "math_se": 10.1,
   "reading": 505.1,
   "reading_se": 15.8,
   "science": 517.7,
   "science_se": 14.9,
   "escs": -0.314,
   "home_test_lang_share": 99.5
  },
  {
   "year": 2015,
   "region": "PT112",
   "group": "overall",
   "students": 266,
   "weighted_share": 100.0,
   "math": 485.7,
   "math_se": 7.6,
   "reading": 487.9,
   "reading_se": 10.6,
   "science": 486.9,
   "science_se": 6.4,
   "escs": -0.721,
   "home_test_lang_share": 98.9
  },
  {
   "year": 2015,
   "region": "PT112",
   "group": "native",
   "students": 257,
   "weighted_share": 96.79,
   "math": 486.8,
   "math_se": 7.2,
   "reading": 488.8,
   "reading_se": 10.8,
   "science": 488.1,
   "science_se": 6.3,
   "escs": -0.74,
   "home_test_lang_share": 99.6
  },
  {
   "year": 2015,
   "region": "PT119",
   "group": "overall",
   "students": 259,
   "weighted_share": 100.0,
   "math": 484.1,
   "math_se": 14.9,
   "reading": 495.3,
   "reading_se": 12.5,
   "science": 488.6,
   "science_se": 14.6,
   "escs": -0.919,
   "home_test_lang_share": 99.2
  },
  {
   "year": 2015,
   "region": "PT119",
   "group": "native",
   "students": 251,
   "weighted_share": 97.19,
   "math": 485.1,
   "math_se": 14.9,
   "reading": 495.8,
   "reading_se": 12.6,
   "science": 489.5,
   "science_se": 14.5,
   "escs": -0.931,
   "home_test_lang_share": 99.8
  },
  {
   "year": 2015,
   "region": "PT11A",
   "group": "overall",
   "students": 972,
   "weighted_share": 100.0,
   "math": 496.4,
   "math_se": 5.8,
   "reading": 500.7,
   "reading_se": 5.3,
   "science": 506.3,
   "science_se": 5.1,
   "escs": -0.403,
   "home_test_lang_share": 99.0
  },
  {
   "year": 2015,
   "region": "PT11A",
   "group": "native",
   "students": 923,
   "weighted_share": 94.88,
   "math": 497.3,
   "math_se": 6.2,
   "reading": 500.8,
   "reading_se": 5.7,
   "science": 506.6,
   "science_se": 5.4,
   "escs": -0.411,
   "home_test_lang_share": 99.5
  },
  {
   "year": 2015,
   "region": "PT11A",
   "group": "second_generation",
   "students": 18,
   "weighted_share": 1.89,
   "math": 539.8,
   "math_se": 26.1,
   "reading": 548.2,
   "reading_se": 20.5,
   "science": 548.2,
   "science_se": 22.8,
   "escs": 0.207,
   "home_test_lang_share": 88.5
  },
  {
   "year": 2015,
   "region": "PT11B",
   "group": "overall",
   "students": 67,
   "weighted_share": 100.0,
   "math": 461.1,
   "math_se": 43.7,
   "reading": 442.0,
   "reading_se": 42.3,
   "science": 460.8,
   "science_se": 40.3,
   "escs": -1.082,
   "home_test_lang_share": 100.0
  },
  {
   "year": 2015,
   "region": "PT11B",
   "group": "native",
   "students": 63,
   "weighted_share": 94.85,
   "math": 466.0,
   "math_se": 43.4,
   "reading": 445.5,
   "reading_se": 43.1,
   "science": 465.7,
   "science_se": 40.2,
   "escs": -1.045,
   "home_test_lang_share": 100.0
  },
  {
   "year": 2015,
   "region": "PT11C",
   "group": "overall",
   "students": 327,
   "weighted_share": 100.0,
   "math": 453.8,
   "math_se": 11.9,
   "reading": 456.5,
   "reading_se": 14.2,
   "science": 459.8,
   "science_se": 11.0,
   "escs": -1.085,
   "home_test_lang_share": 99.3
  },
  {
   "year": 2015,
   "region": "PT11C",
   "group": "native",
   "students": 322,
   "weighted_share": 98.41,
   "math": 455.2,
   "math_se": 12.0,
   "reading": 457.7,
   "reading_se": 13.9,
   "science": 461.0,
   "science_se": 10.8,
   "escs": -1.087,
   "home_test_lang_share": 99.6
  },
  {
   "year": 2015,
   "region": "PT11D",
   "group": "overall",
   "students": 116,
   "weighted_share": 100.0,
   "math": 508.7,
   "math_se": 39.1,
   "reading": 512.4,
   "reading_se": 38.5,
   "science": 521.5,
   "science_se": 40.0,
   "escs": -0.335,
   "home_test_lang_share": 97.8
  },
  {
   "year": 2015,
   "region": "PT11D",
   "group": "native",
   "students": 111,
   "weighted_share": 95.08,
   "math": 508.4,
   "math_se": 38.9,
   "reading": 513.6,
   "reading_se": 38.5,
   "science": 521.1,
   "science_se": 39.5,
   "escs": -0.318,
   "home_test_lang_share": 98.8
  },
  {
   "year": 2015,
   "region": "PT11E",
   "group": "overall",
   "students": 72,
   "weighted_share": 100.0,
   "math": 454.8,
   "math_se": 15.1,
   "reading": 456.3,
   "reading_se": 21.0,
   "science": 464.8,
   "science_se": 6.8,
   "escs": -0.502,
   "home_test_lang_share": 96.8
  },
  {
   "year": 2015,
   "region": "PT11E",
   "group": "native",
   "students": 66,
   "weighted_share": 91.98,
   "math": 459.6,
   "math_se": 16.6,
   "reading": 462.2,
   "reading_se": 23.5,
   "science": 469.8,
   "science_se": 7.2,
   "escs": -0.489,
   "home_test_lang_share": 99.8
  },
  {
   "year": 2015,
   "region": "PT150",
   "group": "overall",
   "students": 202,
   "weighted_share": 100.0,
   "math": 471.1,
   "math_se": 12.1,
   "reading": 489.6,
   "reading_se": 9.9,
   "science": 485.5,
   "science_se": 11.2,
   "escs": -0.454,
   "home_test_lang_share": 92.1
  },
  {
   "year": 2015,
   "region": "PT150",
   "group": "native",
   "students": 164,
   "weighted_share": 80.88,
   "math": 478.2,
   "math_se": 11.0,
   "reading": 494.3,
   "reading_se": 9.8,
   "science": 491.2,
   "science_se": 9.5,
   "escs": -0.445,
   "home_test_lang_share": 97.1
  },
  {
   "year": 2015,
   "region": "PT150",
   "group": "first_generation",
   "students": 18,
   "weighted_share": 8.85,
   "math": 453.6,
   "math_se": 19.5,
   "reading": 470.8,
   "reading_se": 12.3,
   "science": 476.1,
   "science_se": 12.6,
   "escs": -0.517,
   "home_test_lang_share": 55.7
  },
  {
   "year": 2015,
   "region": "PT16B",
   "group": "overall",
   "students": 176,
   "weighted_share": 100.0,
   "math": 488.4,
   "math_se": 20.9,
   "reading": 501.8,
   "reading_se": 24.4,
   "science": 501.4,
   "science_se": 21.1,
   "escs": -0.749,
   "home_test_lang_share": 98.0
  },
  {
   "year": 2015,
   "region": "PT16B",
   "group": "native",
   "students": 153,
   "weighted_share": 88.57,
   "math": 494.6,
   "math_se": 21.7,
   "reading": 504.5,
   "reading_se": 25.4,
   "science": 505.2,
   "science_se": 23.3,
   "escs": -0.745,
   "home_test_lang_share": 99.3
  },
  {
   "year": 2015,
   "region": "PT16D",
   "group": "overall",
   "students": 182,
   "weighted_share": 100.0,
   "math": 489.9,
   "math_se": 15.6,
   "reading": 498.6,
   "reading_se": 12.4,
   "science": 497.5,
   "science_se": 14.6,
   "escs": -0.439,
   "home_test_lang_share": 98.7
  },
  {
   "year": 2015,
   "region": "PT16D",
   "group": "native",
   "students": 166,
   "weighted_share": 92.8,
   "math": 490.2,
   "math_se": 16.9,
   "reading": 497.2,
   "reading_se": 13.1,
   "science": 496.6,
   "science_se": 15.7,
   "escs": -0.469,
   "home_test_lang_share": 99.7
  },
  {
   "year": 2015,
   "region": "PT16E",
   "group": "overall",
   "students": 211,
   "weighted_share": 100.0,
   "math": 501.8,
   "math_se": 15.7,
   "reading": 501.0,
   "reading_se": 12.8,
   "science": 511.5,
   "science_se": 12.1,
   "escs": -0.355,
   "home_test_lang_share": 97.6
  },
  {
   "year": 2015,
   "region": "PT16E",
   "group": "native",
   "students": 200,
   "weighted_share": 95.57,
   "math": 502.8,
   "math_se": 15.8,
   "reading": 502.2,
   "reading_se": 12.7,
   "science": 512.0,
   "science_se": 12.2,
   "escs": -0.381,
   "home_test_lang_share": 99.1
  },
  {
   "year": 2015,
   "region": "PT16F",
   "group": "overall",
   "students": 156,
   "weighted_share": 100.0,
   "math": 506.4,
   "math_se": 17.3,
   "reading": 514.4,
   "reading_se": 11.7,
   "science": 518.7,
   "science_se": 8.2,
   "escs": -0.212,
   "home_test_lang_share": 98.5
  },
  {
   "year": 2015,
   "region": "PT16F",
   "group": "native",
   "students": 144,
   "weighted_share": 93.61,
   "math": 509.3,
   "math_se": 17.0,
   "reading": 516.0,
   "reading_se": 12.5,
   "science": 521.3,
   "science_se": 7.4,
   "escs": -0.196,
   "home_test_lang_share": 99.5
  },
  {
   "year": 2015,
   "region": "PT16G",
   "group": "overall",
   "students": 192,
   "weighted_share": 100.0,
   "math": 513.6,
   "math_se": 13.4,
   "reading": 511.0,
   "reading_se": 8.5,
   "science": 514.8,
   "science_se": 6.6,
   "escs": -0.153,
   "home_test_lang_share": 97.4
  },
  {
   "year": 2015,
   "region": "PT16G",
   "group": "native",
   "students": 176,
   "weighted_share": 89.12,
   "math": 514.5,
   "math_se": 13.7,
   "reading": 511.1,
   "reading_se": 8.6,
   "science": 516.1,
   "science_se": 5.9,
   "escs": -0.188,
   "home_test_lang_share": 99.3
  },
  {
   "year": 2015,
   "region": "PT16H",
   "group": "overall",
   "students": 97,
   "weighted_share": 100.0,
   "math": 509.9,
   "math_se": 14.9,
   "reading": 512.9,
   "reading_se": 13.1,
   "science": 519.1,
   "science_se": 6.6,
   "escs": -0.381,
   "home_test_lang_share": 100.0
  },
  {
   "year": 2015,
   "region": "PT16H",
   "group": "native",
   "students": 88,
   "weighted_share": 90.13,
   "math": 510.0,
   "math_se": 11.9,
   "reading": 512.8,
   "reading_se": 12.3,
   "science": 519.2,
   "science_se": 8.1,
   "escs": -0.379,
   "home_test_lang_share": 100.0
  },
  {
   "year": 2015,
   "region": "PT16I",
   "group": "overall",
   "students": 150,
   "weighted_share": 100.0,
   "math": 503.4,
   "math_se": 10.6,
   "reading": 510.5,
   "reading_se": 10.6,
   "science": 507.9,
   "science_se": 9.8,
   "escs": -0.551,
   "home_test_lang_share": 97.4
  },
  {
   "year": 2015,
   "region": "PT16I",
   "group": "native",
   "students": 146,
   "weighted_share": 98.67,
   "math": 503.2,
   "math_se": 10.4,
   "reading": 510.8,
   "reading_se": 10.7,
   "science": 507.6,
   "science_se": 9.3,
   "escs": -0.552,
   "home_test_lang_share": 97.5
  },
  {
   "year": 2015,
   "region": "PT16J",
   "group": "overall",
   "students": 139,
   "weighted_share": 100.0,
   "math": 502.5,
   "math_se": 13.2,
   "reading": 500.7,
   "reading_se": 14.6,
   "science": 504.5,
   "science_se": 9.0,
   "escs": -0.352,
   "home_test_lang_share": 100.0
  },
  {
   "year": 2015,
   "region": "PT16J",
   "group": "native",
   "students": 130,
   "weighted_share": 93.79,
   "math": 500.9,
   "math_se": 11.4,
   "reading": 497.7,
   "reading_se": 13.9,
   "science": 502.4,
   "science_se": 7.6,
   "escs": -0.412,
   "home_test_lang_share": 100.0
  },
  {
   "year": 2015,
   "region": "PT170",
   "group": "overall",
   "students": 1307,
   "weighted_share": 100.0,
   "math": 493.4,
   "math_se": 4.7,
   "reading": 505.4,
   "reading_se": 5.6,
   "science": 508.2,
   "science_se": 5.3,
   "escs": -0.067,
   "home_test_lang_share": 95.2
  },
  {
   "year": 2015,
   "region": "PT170",
   "group": "native",
   "students": 1086,
   "weighted_share": 82.96,
   "math": 501.7,
   "math_se": 4.8,
   "reading": 509.8,
   "reading_se": 5.7,
   "science": 514.9,
   "science_se": 5.1,
   "escs": 0.022,
   "home_test_lang_share": 98.5
  },
  {
   "year": 2015,
   "region": "PT170",
   "group": "second_generation",
   "students": 89,
   "weighted_share": 6.58,
   "math": 479.7,
   "math_se": 12.2,
   "reading": 507.4,
   "reading_se": 11.0,
   "science": 496.2,
   "science_se": 11.4,
   "escs": -0.283,
   "home_test_lang_share": 94.3
  },
  {
   "year": 2015,
   "region": "PT170",
   "group": "first_generation",
   "students": 101,
   "weighted_share": 8.17,
   "math": 439.5,
   "math_se": 9.6,
   "reading": 471.8,
   "reading_se": 10.2,
   "science": 464.5,
   "science_se": 9.4,
   "escs": -0.707,
   "home_test_lang_share": 66.1
  },
  {
   "year": 2015,
   "region": "PT181",
   "group": "overall",
   "students": 89,
   "weighted_share": 100.0,
   "math": 528.3,
   "math_se": 14.3,
   "reading": 533.8,
   "reading_se": 11.1,
   "science": 536.2,
   "science_se": 8.1,
   "escs": -0.463,
   "home_test_lang_share": 94.7
  },
  {
   "year": 2015,
   "region": "PT181",
   "group": "native",
   "students": 78,
   "weighted_share": 87.24,
   "math": 522.7,
   "math_se": 17.0,
   "reading": 529.6,
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