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Essays on the Economics of Search Algorithms
Essays on the Economics of Search Algorithms
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20250211151316
- ISBN
- 9798382742991
- DDC
- 330.9
- 저자명
- Monk, Kyle.
- 서명/저자
- Essays on the Economics of Search Algorithms
- 발행사항
- [Sl] : Georgetown University, 2024
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2024
- 형태사항
- 159 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 85-11, Section: B.
- 주기사항
- Advisor: Rust, John.
- 학위논문주기
- Thesis (Ph.D.)--Georgetown University, 2024.
- 초록/해제
- 요약This dissertation explores the economics of search algorithms deployed by platforms. Chapters 1 and 2 address challenges in evaluating market power associated with algorithms. Chapter 3 explores the mechanisms that platforms use to alter search outcomes when their access to user data changes.In Chapter 1, I develop a model of search based on competition over algorithms that can be used to evaluate the market power of an algorithm that aids a consumer's search process. In the model, platforms make an endogenous choice about how much their algorithms should favor consumers' preferences versus the platform's profitability-per-consumer. This decision is modeled as a choice to set a distance between realized, consumer-optimal, and platform-optimal search outcomes. Finally, a general framework to apply this model across platform types is presented. In Chapter 2, the model is applied to JD.com e-commerce data. First, I estimate a discrete choice model of consumer purchase decisions given their search outcomes. Then, I estimate the structural search model. I find that the algorithms achieve an outcome almost identical to the outcomes that maximize the platform's profitability-per-user. The finding suggests one of two possibilities: JD.com has tremendous market power in the market studied, or JD.com is using a suboptimal ranking algorithm that maximizes profits-per-consumer rather than total profits. Realigning the incentives of the platform and consumers by banning first-party participation on e-commerce platforms would improve the market outcomes for consumers and sellers, however, it would decrease the platform's profitability-per-consumer by a larger magnitude. In Chapter 3, I calibrate a structural model of consumer search that allows the platform's beliefs about the consumer to be incorrect. The model estimates the weights the platform places on user preferences and expected profits when choosing to display search results. I estimate this model separately for JD.com shoppers that the platform possesses predictive data about and for those without this data. Then, I simulate search and purchase outcomes for the shoppers with predictive data as if this data did not exist. Finally, I decompose the effects into those from price discrimination, those from personalized steering, and those from changes in market power.
- 키워드
- Algorithms
- 키워드
- Market power
- 기타저자
- Georgetown University Economics
- 기본자료저록
- Dissertations Abstracts International. 85-11B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■00520250211151316
■006m o d
■007cr#unu||||||||
■020 ▼a9798382742991
■035 ▼a(MiAaPQ)AAI31238506
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a330.9
■1001 ▼aMonk, Kyle.
■24510▼aEssays on the Economics of Search Algorithms
■260 ▼a[Sl]▼bGeorgetown University▼c2024
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2024
■300 ▼a159 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 85-11, Section: B.
■500 ▼aAdvisor: Rust, John.
■5021 ▼aThesis (Ph.D.)--Georgetown University, 2024.
■520 ▼aThis dissertation explores the economics of search algorithms deployed by platforms. Chapters 1 and 2 address challenges in evaluating market power associated with algorithms. Chapter 3 explores the mechanisms that platforms use to alter search outcomes when their access to user data changes.In Chapter 1, I develop a model of search based on competition over algorithms that can be used to evaluate the market power of an algorithm that aids a consumer's search process. In the model, platforms make an endogenous choice about how much their algorithms should favor consumers' preferences versus the platform's profitability-per-consumer. This decision is modeled as a choice to set a distance between realized, consumer-optimal, and platform-optimal search outcomes. Finally, a general framework to apply this model across platform types is presented. In Chapter 2, the model is applied to JD.com e-commerce data. First, I estimate a discrete choice model of consumer purchase decisions given their search outcomes. Then, I estimate the structural search model. I find that the algorithms achieve an outcome almost identical to the outcomes that maximize the platform's profitability-per-user. The finding suggests one of two possibilities: JD.com has tremendous market power in the market studied, or JD.com is using a suboptimal ranking algorithm that maximizes profits-per-consumer rather than total profits. Realigning the incentives of the platform and consumers by banning first-party participation on e-commerce platforms would improve the market outcomes for consumers and sellers, however, it would decrease the platform's profitability-per-consumer by a larger magnitude. In Chapter 3, I calibrate a structural model of consumer search that allows the platform's beliefs about the consumer to be incorrect. The model estimates the weights the platform places on user preferences and expected profits when choosing to display search results. I estimate this model separately for JD.com shoppers that the platform possesses predictive data about and for those without this data. Then, I simulate search and purchase outcomes for the shoppers with predictive data as if this data did not exist. Finally, I decompose the effects into those from price discrimination, those from personalized steering, and those from changes in market power.
■590 ▼aSchool code: 0076.
■653 ▼aAlgorithms
■653 ▼aDigital economics
■653 ▼aIndustrial organization
■653 ▼aMarket power
■653 ▼aPersonalized pricing
■690 ▼a0501
■690 ▼a0796
■690 ▼a0338
■71020▼aGeorgetown University▼bEconomics.
■7730 ▼tDissertations Abstracts International▼g85-11B.
■790 ▼a0076
■791 ▼aPh.D.
■792 ▼a2024
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17161147▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.


