{
 "study": "s23",
 "version": "1.0",
 "collected": "2026-09-26",
 "statistics": {
  "collected": "2026-09-26",
  "questions": 80,
  "citations": 2492,
  "bing_discarded": {
   "reason": "Bing SERP returned unrelated results (e.g. melamine resin, Buckingham Palace) for buyer questions; retested with location_name/device and a short keyword with the same result",
   "bing_requests_discarded": 80
  },
  "by_engine": {
   "chatgpt": {
    "citations": 384,
    "url_in_google_top10_pct": 8.3,
    "domain_in_google_top10_pct": 22.9,
    "answers_citing_any_top10_url_pct": 32.5,
    "local_url_in_top10_pct": 8.5,
    "national_url_in_top10_pct": 8.3,
    "median_citations_per_answer": 4.5
   },
   "gemini": {
    "citations": 259,
    "url_in_google_top10_pct": 16.6,
    "domain_in_google_top10_pct": 23.6,
    "answers_citing_any_top10_url_pct": 39.7,
    "local_url_in_top10_pct": 6.0,
    "national_url_in_top10_pct": 21.6,
    "median_citations_per_answer": 3
   },
   "perplexity": {
    "citations": 1588,
    "url_in_google_top10_pct": 14.2,
    "domain_in_google_top10_pct": 26.5,
    "answers_citing_any_top10_url_pct": 78.8,
    "local_url_in_top10_pct": 13.1,
    "national_url_in_top10_pct": 14.7,
    "median_citations_per_answer": 20.0
   },
   "claude": {
    "citations": 261,
    "url_in_google_top10_pct": 25.7,
    "domain_in_google_top10_pct": 32.2,
    "answers_citing_any_top10_url_pct": 60.7,
    "local_url_in_top10_pct": 33.0,
    "national_url_in_top10_pct": 20.9,
    "median_citations_per_answer": 4
   }
  },
  "reference_ai_overviews_url_in_top10_pct": 28.7,
  "derived": {
   "claude_vs_chatgpt_url_ratio": 3.1,
   "chatgpt_not_in_top10_pct": 91.7
  }
 }
}