{
  "schemaVersion": 1,
  "reviewedOn": "2026-09-14",
  "datasetVersion": "2026.09.15-historical-evidence",
  "previousArchive": "e18122f6f27bd4f94901738b5c4b441188efdfa801b6ebfa808b65d85a7a6cf2",
  "previousBundleUrl": "/datasets/e18122f6f27bd4f94901738b5c4b441188efdfa801b6ebfa808b65d85a7a6cf2/bundle.json",
  "corrections": [
    "bread-price-used-as-pita-in-1980",
    "may-1979-rule-mistaken-for-full-year-freeze"
  ],
  "pricePrecision": "Existing canonical price rounding to 0.001 EUR is retained; GRD conversions of published prices differ from unrounded source calendars.",
  "incomeChanged": false,
  "compositionChanged": false,
  "rows": [
    {
      "year": 1979,
      "before": {
        "priceEUR": 0.033,
        "priceGRD": 11.24475,
        "rawIndex": 673,
        "constantIndex": 353
      },
      "after": {
        "priceEUR": 0.039,
        "priceGRD": 13.28925,
        "rawIndex": 570,
        "constantIndex": 296
      },
      "rawPurchasingPowerChangePct": -15.384615384615385,
      "constantPurchasingPowerChangePct": -15.999999999999993,
      "sourceId": "cpi",
      "classification": "INTERPOLATED"
    },
    {
      "year": 1980,
      "before": {
        "priceEUR": 0.04,
        "priceGRD": 13.63,
        "rawIndex": 660,
        "constantIndex": 356
      },
      "after": {
        "priceEUR": 0.049,
        "priceGRD": 16.69675,
        "rawIndex": 538,
        "constantIndex": 290
      },
      "rawPurchasingPowerChangePct": -18.36734693877551,
      "constantPurchasingPowerChangePct": -18.681318681318682,
      "sourceId": "messinia1980Calendar",
      "classification": "MODELLED"
    },
    {
      "year": 1981,
      "before": {
        "priceEUR": 0.052,
        "priceGRD": 17.718999999999998,
        "rawIndex": 700,
        "constantIndex": 387
      },
      "after": {
        "priceEUR": 0.06,
        "priceGRD": 20.445,
        "rawIndex": 606,
        "constantIndex": 337
      },
      "rawPurchasingPowerChangePct": -13.33333333333333,
      "constantPurchasingPowerChangePct": -12.962962962962965,
      "sourceId": "cpi",
      "classification": "INTERPOLATED"
    },
    {
      "year": 1982,
      "before": {
        "priceEUR": 0.067,
        "priceGRD": 22.830250000000003,
        "rawIndex": 833,
        "constantIndex": 469
      },
      "after": {
        "priceEUR": 0.071,
        "priceGRD": 24.19325,
        "rawIndex": 786,
        "constantIndex": 440
      },
      "rawPurchasingPowerChangePct": -5.63380281690139,
      "constantPurchasingPowerChangePct": -6.299212598425208,
      "sourceId": "cpi",
      "classification": "INTERPOLATED"
    }
  ],
  "anchor1980": {
    "previousAnnualCeilingGRD": 12.18,
    "annualCeilingGRD": 14.939890710382514,
    "regulationUplift": 1.11,
    "unroundedModelPriceEUR": 0.048666995417533644,
    "calendar": {
      "id": "messinia-1980-regulated-pita-calendar",
      "year": 1980,
      "classification": "conditional-reconstruction",
      "metric": "day-weighted-regulated-gyro-pita-price",
      "unit": "GRD",
      "geographicScope": "Messinia",
      "usedInModel": true,
      "completenessCertified": false,
      "title": {
        "el": "Μεσσηνία 1980: ανασύνθεση της ετήσιας διατίμησης",
        "en": "Messinia 1980: reconstructed annual regulated price"
      },
      "assumptions": {
        "el": "Κάθε καταγεγραμμένη διάταξη θεωρείται ότι διατηρεί την τιμή μέχρι την επόμενη καταγεγραμμένη αντικατάσταση. Δεν έχει πιστοποιηθεί εξαντλητικά ότι δεν υπήρξαν άλλες τροποποιήσεις. Όρθιοι πελάτες, γύρος σε πίτα και καρυκεύματα. Δεν εφαρμόζεται προσαύξηση καθήμενου ή συντελεστής αναγωγής σε αγορά.",
        "en": "Each captured order is assumed to retain its price until the next captured replacement. Absence of other amendments has not been exhaustively certified. Standing customers, gyro in pita with seasoning. No seated-service surcharge or market-conversion factor is applied."
      },
      "interpretation": {
        "el": "Υπολογισμένη ετήσια διατίμηση γύρου με πίτα στη Μεσσηνία. Τροφοδοτεί την άγκυρα του 1980, με την υπάρχουσα αναγωγή διατίμησης. Δεν είναι μετρημένη εθνική μέση τιμή αγοράς.",
        "en": "Calculated annual ceiling for gyro in pita in Messinia. Feeds the 1980 anchor with the existing regulation adjustment. It is not a measured national mean market price."
      },
      "periods": [
        {
          "start": "1980-01-01",
          "end": "1980-02-09",
          "sourceId": "tharros-1979-messinia-order-15",
          "findingKind": "regulated-gyro-pita",
          "days": 40,
          "price": 13,
          "sourceUrl": "https://museum.codingplus.gr/app-media/laiki-viv/media/collectiveaccess/images/6/8/52369_ca_object_representations_media_6863_original.pdf#page=1"
        },
        {
          "start": "1980-02-10",
          "end": "1980-12-02",
          "sourceId": "tharros-1980-messinia-order-5",
          "findingKind": "regulated-gyro-pita",
          "days": 297,
          "price": 15,
          "sourceUrl": "https://museum.codingplus.gr/app-media/laiki-viv/media/collectiveaccess/images/9/1/89278_ca_object_representations_media_9100_original.pdf#page=4"
        },
        {
          "start": "1980-12-03",
          "end": "1980-12-31",
          "sourceId": "tharros-1980-messinia-order-34",
          "findingKind": "regulated-gyro-pita",
          "days": 29,
          "price": 17,
          "sourceUrl": "https://museum.codingplus.gr/app-media/laiki-viv/media/collectiveaccess/images/9/7/10096_ca_object_representations_media_9793_original.pdf#page=2"
        }
      ],
      "days": 366,
      "weightedMean": 14.939890710382514
    }
  },
  "caveat": {
    "el": "Η νέα βάση είναι ανακατασκευή περιφερειακής διατίμησης. Η συνέχεια των διατάξεων, η εθνική αντιπροσωπευτικότητα και η προσαύξηση διατίμησης παραμένουν παραδοχές. Δεν αλλάζουν μισθοί ή μοντέλο μερίδας. Η επίδραση δεν είναι νέα μέτρηση ακρίβειας, αλλά διόρθωση παλιών εισόδων.",
    "en": "The replacement is a reconstructed regional ceiling. Continuity, national representativeness and the regulation uplift remain assumptions. Wages and portion model are unchanged. The impact is a correction of historical inputs, not a newly measured inflation rate."
  }
}