Título:
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The Few-get-richer: a surprising consequence of popularity-based rankings
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Autor/a:
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Germano, Fabrizio; Gómez, Vicenç; Le Mens, Gaël
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Abstract:
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Ranking algorithms play a crucial role in online platforms ranging
from search engines to recommender systems. In this paper, we
identify a surprising consequence of popularity-based rankings: the
fewer the items reporting a given signal, the higher the share of the
overall traffic they collectively attract. This few-get-richer effect
emerges in settings where there are few distinct classes of items
(e.g., left-leaning news sources versus right-leaning news sources),
and items are ranked based on their popularity. We demonstrate
analytically that the few-get-richer effect emerges when people tend
to click on top-ranked items and have heterogeneous preferences
for the classes of items. Using simulations, we analyze how the
strength of the effect changes with assumptions about the setting
and human behavior.We also test our predictions experimentally in
an online experiment with human participants. Our findings have
important implications to understand the spread of misinformation. |
Abstract:
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Comunicació presentada a: the 2019 World Wide Web Conference (WWW ’19), celebrat a San Francisco, Estat Units d'Amèrica, del 13 al 17 de maig de 2019. |
Abstract:
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F. Germano acknowledges financial support from Grant ECO2017-89240-P
(AEI/FEDER, UE) from the Spanish MINECO. G. Le Mens benefited from financial
support from Ramon y Cajal Fellowship RYC-2014-15035 and Grant #AEI/FEDER
UE-PSI2016-75353 from the Spanish MINECO, and ERC Consolidator Grant #772268
from the European Commission. V. Gómez is funded by the Ramon y Cajal program
RYC-2015-18878 (AEI/MINECO/FSE,UE) and the María de Maeztu Units of Excellence
Programme (MDM-2015-0502). The research leading to these results has received
funding from “La Caixa" Banking Foundation. Data from the experiment are available
at https://osf.io/nwjyf/. |
Derechos:
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This paper is published under the Creative Commons Attribution 4.0 International
(CC-BY 4.0) license. Authors reserve their rights to disseminate the work on their personal and corporate Web sites with the appropriate attribution.
WWW ’19, May 13–17, 2019, San Francisco, CA, USA
© 2019 IW3C2 (International World Wide Web Conference Committee), published
under Creative Commons CC-BY 4.0 License.
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Tipo de documento:
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Objeto de conferencia Artículo - Versión publicada |
Editor:
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ACM Association for Computer Machinery
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