Reputation system

reputation systemsfeedback systemsreputation pointssocial reputationreputation and feedback mechanismreputation modelsSeller Feedbackuser reputation
Reputation systems are programs that allow users to rate each other in online communities in order to build trust through reputation.wikipedia
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TrustedSource

TrustedSource is an Internet reputation system originally developed by CipherTrust and now owned by Intel Security.

Stack Overflow

StackOverflow
For example, on the Stack Overflow community, reputation points can be spent on question "bounties" to incentivize other users to answer the question.
Users of Stack Overflow can earn reputation points and "badges"; for example, a person is awarded 10 reputation points for receiving an "up" vote on an answer given to a question and 10 points for the "up" vote of a question, and can receive badges for their valued contributions, which represents a kind of gamification of the traditional Q&A site.

Epinions

Epinions.com
Epinions.com’s reputation system was not abuse-proof, but the company maintained a customer care unit in the event a dispute did arise.

Collaborative filtering

collaborative filtercollaboratively filteredfilter
Collaborative filtering, used most commonly in recommender systems, are related to reputation systems in that they both collect ratings from members of a community.

ProZ.com

The website features reputation systems: WWA for translators and the BlueBoard for outsourcers.

Social Credit System

Chinese Social Credit Systemnew social policysocial credit rating
The Social Credit System is a national reputation system being developed by the Chinese government.

GlobalGiving

Global Giving
The funding and project update history for each project is public and acts as a form of reputation system for the organization implementing the project.

Sybil attack

The Sybil attack in computer security is an attack wherein a reputation system is subverted by creating multiple identities.

Online participation

actively involvedcontributing to online communitiesMotivations for online participation
A study on the participation in eBay's reputation system demonstrated that the expectation of reciprocal behavior from partners increases participation from self-interested eBay buyers and sellers.

Trust metric

reputation pointsattack-resistant trust metricDegree of trust
They are closely related to reputation systems.

E-commerce

electronic commerceeCommerceonline
Some common uses of these systems can be found on E-commerce websites such as eBay, Amazon.com, and Etsy as well as online advice communities such as Stack Exchange.

EBay

E-bayeBay.comeBay Inc
Some common uses of these systems can be found on E-commerce websites such as eBay, Amazon.com, and Etsy as well as online advice communities such as Stack Exchange.

Amazon (company)

Amazon.comAmazonAmazon.co.uk
Some common uses of these systems can be found on E-commerce websites such as eBay, Amazon.com, and Etsy as well as online advice communities such as Stack Exchange.

Etsy

Etsy.comChad DickersonThe Etsy Blog
Some common uses of these systems can be found on E-commerce websites such as eBay, Amazon.com, and Etsy as well as online advice communities such as Stack Exchange.

Stack Exchange

Stack Exchange NetworkStackExchangeServer Fault
Some common uses of these systems can be found on E-commerce websites such as eBay, Amazon.com, and Etsy as well as online advice communities such as Stack Exchange.

Recommender system

recommender systemsrecommendation systemrecommendation systems
Collaborative filtering, used most commonly in recommender systems, are related to reputation systems in that they both collect ratings from members of a community.

Howard Rheingold

Rheingold, Howard
Howard Rheingold states that online reputation systems are "computer-based technologies that make it possible to manipulate in new and powerful ways an old and essential human trait".

Sharing economy

Access economysharingsharing economies
The emerging sharing economy increases the importance of trust in peer-to-peer marketplaces and services.

Reputation capital

reputational capital
Rachel Botsman and Roo Rogers argue in their book What's Mine is Yours (2010), that "it is only a matter of time before there is some form of network that aggregates reputation capital across multiple forms of Collaborative Consumption".

Internet Engineering Task Force

IETFInternet Engineering Task Force (IETF)IETF Working Group
The IETF proposed a protocol to exchange reputation data.

PageRank

page rankGoogle algorithmGoogle PageRank