{
  "status": "Fixed-formula comparable-period research complete",
  "common_pairs_by_cycle": {
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    "2008": 20,
    "2010": 17,
    "2012": 24,
    "2014": 24,
    "2016": 24,
    "2018": 28,
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    "2022": 26,
    "2024": 27,
    "2026": 22
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        "limits": "Whole-election sign symmetry is an assumption; few elections and overlapping training limit inference. Bootstrap interval is descriptive, not independent confirmation."
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  "publication_changed": false,
  "limits": "Historical source revisions are not an as-published filing archive. Current API financial figures require independent source-report reconciliation before adoption. Effect uncertainty not newly calibrated."
}