{
 "study": "s7",
 "version": "1.0",
 "collected": "2026-09-26",
 "statistics": {
  "n_answers": 560,
  "s7_n_prompts": 80,
  "s7_brands_per_answer_median": {
   "chatgpt": 6.0,
   "gemini": 5.0,
   "perplexity": 5.0,
   "claude": 4.0
  },
  "s7_no_brand_answers_pct": {
   "chatgpt": 2.5,
   "gemini": 3.8,
   "perplexity": 0.0,
   "claude": 5.0
  },
  "s7_chars_median": {
   "chatgpt": 2889.5,
   "gemini": 3939.0,
   "perplexity": 1377.5,
   "claude": 1441.0
  },
  "s7_pairwise": {
   "chatgpt-gemini": {
    "mean_brand_jaccard": 0.374,
    "n": 75,
    "same_first_brand_pct": 32.0
   },
   "chatgpt-perplexity": {
    "mean_brand_jaccard": 0.369,
    "n": 78,
    "same_first_brand_pct": 38.5
   },
   "chatgpt-claude": {
    "mean_brand_jaccard": 0.314,
    "n": 74,
    "same_first_brand_pct": 27.0
   },
   "gemini-perplexity": {
    "mean_brand_jaccard": 0.381,
    "n": 77,
    "same_first_brand_pct": 40.3
   },
   "gemini-claude": {
    "mean_brand_jaccard": 0.378,
    "n": 73,
    "same_first_brand_pct": 31.5
   },
   "perplexity-claude": {
    "mean_brand_jaccard": 0.363,
    "n": 76,
    "same_first_brand_pct": 28.9
   }
  },
  "s7_mean_pairwise_jaccard": 0.363,
  "s7_brand_engine_count_dist_pct": {
   "named by 1 engine(s)": 56.7,
   "named by 2 engine(s)": 20.5,
   "named by 3 engine(s)": 12.5,
   "named by 4 engine(s)": 10.2
  },
  "s7_distinct_brands_total": 950,
  "s7_union_brands_per_prompt_median": 10.0,
  "s7_prompts_with_brand_named_by_all4_pct": 60.0,
  "s7_all4_same_first_brand_pct": 11.2,
  "s7_3plus_same_first_brand_pct": 36.2,
  "s7_jaccard_local_vs_national": {
   "local": {
    "n": 24,
    "mean": 0.193
   },
   "national": {
    "n": 56,
    "mean": 0.426
   }
  },
  "s7_jaccard_by_industry": {
   "B2B software and technology": 0.597,
   "Financial services and insurance": 0.318,
   "Franchises and multi-location brands": 0.303,
   "Healthcare and dental": 0.305,
   "Home and local services": 0.258,
   "Hospitality and travel": 0.406,
   "Legal and professional services": 0.247,
   "Retail and ecommerce": 0.413
  },
  "s7_sources": {
   "chatgpt": {
    "answers_with_sources_pct": 100.0,
    "median_sources": 4.5,
    "top_domains": [
     [
      "nerdwallet.com",
      11
     ],
     [
      "birdeye.com",
      6
     ],
     [
      "superlawyers.com",
      4
     ],
     [
      "rtings.com",
      4
     ],
     [
      "travelandleisure.com",
      3
     ],
     [
      "bestlawfirms.com",
      3
     ],
     [
      "justia.com",
      3
     ],
     [
      "tomsguide.com",
      3
     ]
    ],
    "types_pct_of_domain_mentions": {
     "Other website": 87.5,
     "Review site or directory": 9.1,
     "Government": 2.4,
     "Google property": 0.3,
     "Education": 0.3,
     "Marketplace or retailer": 0.3
    }
   },
   "gemini": {
    "answers_with_sources_pct": 91.2,
    "median_sources": 3.0,
    "top_domains": [
     [
      "google.com",
      17
     ],
     [
      "forbes.com",
      5
     ],
     [
      "youtube.com",
      4
     ],
     [
      "cnet.com",
      4
     ],
     [
      "pcmag.com",
      3
     ],
     [
      "bankrate.com",
      3
     ],
     [
      "money.com",
      3
     ],
     [
      "frandb.com",
      2
     ]
    ],
    "types_pct_of_domain_mentions": {
     "Other website": 86.1,
     "Google property": 8.2,
     "Forum, social or video": 2.9,
     "Review site or directory": 2.9
    }
   },
   "perplexity": {
    "answers_with_sources_pct": 100.0,
    "median_sources": 20.0,
    "top_domains": [
     [
      "forbes.com",
      34
     ],
     [
      "nerdwallet.com",
      19
     ],
     [
      "cnbc.com",
      16
     ],
     [
      "businessinsider.com",
      15
     ],
     [
      "expertise.com",
      13
     ],
     [
      "nytimes.com",
      13
     ],
     [
      "techradar.com",
      13
     ],
     [
      "consumeraffairs.com",
      13
     ]
    ],
    "types_pct_of_domain_mentions": {
     "Other website": 90.4,
     "Review site or directory": 7.8,
     "Forum, social or video": 0.9,
     "Government": 0.3,
     "Education": 0.3,
     "Wikipedia": 0.1,
     "Marketplace or retailer": 0.1
    }
   },
   "claude": {
    "answers_with_sources_pct": 76.2,
    "median_sources": 4.0,
    "top_domains": [
     [
      "nerdwallet.com",
      11
     ],
     [
      "yelp.com",
      7
     ],
     [
      "forbes.com",
      6
     ],
     [
      "usnews.com",
      5
     ],
     [
      "cnbc.com",
      5
     ],
     [
      "vettedbiz.com",
      3
     ],
     [
      "yahoo.com",
      3
     ],
     [
      "tripadvisor.com",
      2
     ]
    ],
    "types_pct_of_domain_mentions": {
     "Other website": 93.6,
     "Review site or directory": 5.6,
     "Education": 0.4,
     "Government": 0.4
    }
   }
  },
  "s7_source_domain_jaccard": {
   "chatgpt-gemini": 0.043,
   "chatgpt-perplexity": 0.105,
   "chatgpt-claude": 0.07,
   "gemini-perplexity": 0.076,
   "gemini-claude": 0.066,
   "perplexity-claude": 0.117
  },
  "s7_distinct_brands_global": 914,
  "s7_brand_question_pairs": 950
 }
}