[
  {
    "concept": "Current AI use",
    "btos_2024_question": 1,
    "questionnaire_2026_number": 23,
    "source_id_note": "2026 core workbook ID 7; supplement ID 1",
    "status": "CHANGED_DEFINITION",
    "reason": "Producing goods/services changed to any business function; retain separate rates.",
    "numeric_trend_approved": false
  },
  {
    "concept": "Types and applications",
    "btos_2024_question": 2,
    "questionnaire_2026_number": 24,
    "source_id_note": "2026 supplement ID 2",
    "status": "CHANGED_CONCEPT",
    "reason": "Technology/application types changed to business functions; no itemwise trend.",
    "numeric_trend_approved": false
  },
  {
    "concept": "Employee task replacement",
    "btos_2024_question": 3,
    "questionnaire_2026_number": 25,
    "source_id_note": "2026 supplement ID 3",
    "status": "CHANGED_QUESTION_AND_SCOPE",
    "reason": "Yes/no question changed to multi-select replacement/assistance/new tasks; AI-user population broadened.",
    "numeric_trend_approved": false
  },
  {
    "concept": "Extent of task replacement",
    "btos_2024_question": 4,
    "questionnaire_2026_number": 26,
    "source_id_note": "2026 supplement ID 4",
    "status": "SAME_CATEGORIES_CHANGED_SCOPE",
    "reason": "Small/moderate/large categories remain; qualifying AI-user population differs.",
    "numeric_trend_approved": false
  },
  {
    "concept": "Software/equipment replacement",
    "btos_2024_question": 5,
    "questionnaire_2026_number": 27,
    "source_id_note": "2026 supplement ID 5",
    "status": "SIMILAR_CONCEPT_CHANGED_SCOPE",
    "reason": "Older question restricts operations to production of goods/services.",
    "numeric_trend_approved": false
  },
  {
    "concept": "Employment effects",
    "btos_2024_question": 6,
    "questionnaire_2026_number": 28,
    "source_id_note": "2026 supplement ID 6",
    "status": "SAME_CONCEPT_CHANGED_SCOPE",
    "reason": "Both ask total employment effects; qualifying AI use is broader in 2026.",
    "numeric_trend_approved": false
  },
  {
    "concept": "Implementation changes",
    "btos_2024_question": 7,
    "questionnaire_2026_number": 29,
    "source_id_note": "2026 supplement ID 7",
    "status": "SHARED_ITEMS_CHANGED_SCOPE",
    "reason": "Training/workflows/cloud/data/vendor items overlap; purchase category also changed.",
    "numeric_trend_approved": false
  },
  {
    "concept": "Expected AI use",
    "btos_2024_question": 8,
    "questionnaire_2026_number": 33,
    "source_id_note": "2026 core workbook ID 24; supplement ID 11",
    "status": "CHANGED_DEFINITION",
    "reason": "Future adoption definition broadened; plans are not observed outcomes.",
    "numeric_trend_approved": false
  },
  {
    "concept": "Expected applications",
    "btos_2024_question": 9,
    "questionnaire_2026_number": 34,
    "source_id_note": "2026 supplement ID 12",
    "status": "CHANGED_CONCEPT",
    "reason": "Types/applications changed to planned business functions.",
    "numeric_trend_approved": false
  },
  {
    "concept": "Expected employee-task replacement",
    "btos_2024_question": 10,
    "questionnaire_2026_number": null,
    "source_id_note": "",
    "status": "NO_2026_COUNTERPART",
    "reason": "No matching expected-task-replacement question in the newer 13-question supplement.",
    "numeric_trend_approved": false
  },
  {
    "concept": "Expected replacement extent",
    "btos_2024_question": 11,
    "questionnaire_2026_number": null,
    "source_id_note": "",
    "status": "NO_2026_COUNTERPART",
    "reason": "No matching expected-task-extent question.",
    "numeric_trend_approved": false
  },
  {
    "concept": "Expected software/equipment replacement",
    "btos_2024_question": 12,
    "questionnaire_2026_number": null,
    "source_id_note": "",
    "status": "NO_2026_COUNTERPART",
    "reason": "No matching expected-equipment-replacement question.",
    "numeric_trend_approved": false
  },
  {
    "concept": "Expected employment effect",
    "btos_2024_question": 13,
    "questionnaire_2026_number": null,
    "source_id_note": "",
    "status": "NO_2026_COUNTERPART",
    "reason": "New supplement measures past effect, not an identical AI employment forecast.",
    "numeric_trend_approved": false
  },
  {
    "concept": "Expected organizational changes",
    "btos_2024_question": 14,
    "questionnaire_2026_number": null,
    "source_id_note": "",
    "status": "NO_2026_COUNTERPART",
    "reason": "New supplement measures past organizational changes; general AI-use expectations differ.",
    "numeric_trend_approved": false
  },
  {
    "concept": "Reasons for no AI plans",
    "btos_2024_question": 15,
    "questionnaire_2026_number": 35,
    "source_id_note": "2026 supplement ID 13",
    "status": "SHARED_ITEMS_CHANGED_SCOPE",
    "reason": "Barrier labels overlap, but non-planners are defined using different AI scope.",
    "numeric_trend_approved": false
  },
  {
    "concept": "Employee AI assistance",
    "btos_2024_question": null,
    "questionnaire_2026_number": 30,
    "source_id_note": "2026 supplement ID 8",
    "status": "NEW_2026_QUESTION",
    "reason": "No direct counterpart in the older supplement.",
    "numeric_trend_approved": false
  },
  {
    "concept": "Employee generative-AI assistance",
    "btos_2024_question": null,
    "questionnaire_2026_number": 31,
    "source_id_note": "2026 supplement ID 9",
    "status": "NEW_2026_QUESTION",
    "reason": "2024 large-language-model application item is not an equivalent employee-use measure.",
    "numeric_trend_approved": false
  },
  {
    "concept": "Generative-AI work tasks",
    "btos_2024_question": null,
    "questionnaire_2026_number": 32,
    "source_id_note": "2026 supplement ID 10",
    "status": "NEW_2026_QUESTION",
    "reason": "New employee-task detail is not comparable to older AI technology-type categories.",
    "numeric_trend_approved": false
  }
]