{
 "@context": "https://schema.org",
 "@type": "DefinedTerm",
 "@id": "https://wulfkaal.github.io/entities/ebay",
 "identifier": "kaal:entity:ebay",
 "name": "Ebay",
 "termCode": "ebay",
 "inDefinedTermSet": {
  "@id": "https://wulfkaal.github.io/entities/index.json"
 },
 "author": {
  "@type": "Person",
  "name": "Wulf A. Kaal",
  "identifier": "https://orcid.org/0000-0003-0757-275X"
 },
 "dateModified": "2026-07-29",
 "canonicalForm": "https://wulfkaal.github.io/entities/ebay.md",
 "sha256": "54a900757aed9c28ee3e1d336a46442ab60955d53dc45615b5cebc70e8c66d6c",
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   "name": "status",
   "value": "derived"
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   "value": 3
  },
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   "value": 3
  },
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   "@type": "PropertyValue",
   "name": "year_span",
   "value": [
    "2018",
    "2021"
   ]
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  }
 ],
 "subjectOf": [
  {
   "@type": "Claim",
   "@id": "https://wulfkaal.github.io/claims/3266953-007",
   "identifier": "kaal:claim:3266953-007",
   "text": "Displayed net feedback scores are a poor reputation instrument because they encourage Pollyanna assessments of reputation and are far from the best predictor of performance available in the data.",
   "abstract": "However, the net feedback scores that eBay displays encourages Pollyanna assessments of reputations, and is far from the best predictor available.",
   "citation": "Craig Calcaterra, Wulf A. Kaal, Gopinath Sivalingam, Reputation Protocol for the Internet of Trust - Conceptual Whitepaper (2018). SSRN: https://ssrn.com/abstract=3266953",
   "datePublished": "2018",
   "claim_type": "failure",
   "confidence": "evidenced",
   "is_failure_mode": true,
   "scope_conditions": [
    "eBay feedback data from 1999"
   ],
   "source_pdf_sha256": "781758dea356e55d79c73ad7f1debe7c83de398bd1cd9e0a9a6c2802f276b4c0",
   "status": "current"
  },
  {
   "@type": "Claim",
   "@id": "https://wulfkaal.github.io/claims/3411897-007",
   "identifier": "kaal:claim:3411897-007",
   "text": "eBay's user rating system, despite being its biggest competitive advantage, is clearly flawed, and the persistence of those flaws demonstrates the unmet need for a decentralized reputation verification system, since no better technology has yet been produced.",
   "abstract": "While the user ratings eBay uses clearly have flaws (that illustrate the need for a decentralized reputation verification system – discussed in Chapter 6), so far, nobody has been able to come up with a better technology.",
   "citation": "Wulf A. Kaal, Decentralization - Past, Present, and Future (2019). SSRN: https://ssrn.com/abstract=3411897",
   "datePublished": "2019",
   "claim_type": "failure",
   "confidence": "argued",
   "is_failure_mode": true,
   "scope_conditions": [
    "applies to centralized platform reputation systems as of 2019"
   ],
   "source_pdf_sha256": "82f0aea026b3e3a526ec51bc073b3b864dc06cd9083ff9c54c550037045edaa9",
   "status": "current"
  },
  {
   "@type": "Claim",
   "@id": "https://wulfkaal.github.io/claims/3808852-014",
   "identifier": "kaal:claim:3808852-014",
   "text": "eBay's user rating system is visibly flawed and illustrates the need for a decentralized reputation verification system, yet no entity or individual has produced a better technology, and those decentralized ratings remained eBay's biggest competitive advantage.",
   "abstract": "While the user ratings eBay uses clearly have flaws (that illustrate the need for a decentralized reputation verification system), so far, no entity or individual has been able to come up with a better technology.",
   "citation": "Wulf A. Kaal, Decentralization and Feedback Effects (2021). SSRN: https://ssrn.com/abstract=3808852",
   "datePublished": "2021",
   "claim_type": "failure",
   "confidence": "argued",
   "is_failure_mode": true,
   "scope_conditions": [],
   "source_pdf_sha256": "31e91158fdeefebc2f0be54ebf89751f7cdd4c89ecea932888f5ba9be6b1caba",
   "status": "current"
  }
 ],
 "description": "3 claims in the published works of Wulf A. Kaal carry the concept tag 'ebay'. Derived node: a roster, not an adjudicated definition."
}