ComputerMediated Communication Reputation Part I Coye Cheshire Andrew

Computer-Mediated Communication Reputation (Part I) Coye Cheshire & Andrew Fiore //

Internet situations by frequency & continuity Continuity Freq. Random Partner Fixed Partner One-shot interaction § Email solicitations Iterated interaction § Peer-to-peer digital goods exchange § Online communities § Online “pick-up” games (e. g. , cards) § Chat programs Christo's birthday § Email attachments from unknown sources § Online auctions § Massively Computer-Mediated Communication — Cheshire & Fiore 1 multiplayer games

Trust Networks Under Uncertainty “Trust Networks” § System view § Ego-centric view Christo's birthday Computer-Mediated Communication — Cheshire & Fiore 2

What are the Solutions to Uncertainty in CMC Environments? Proxies and ‘inferred trustworthiness’ Institutional backing Closed Systems versus Open Systems § Experiential, often negativeonly reputations (not explicit) 3 rd party (explicit) reputation Christo's birthday Computer-Mediated Communication — Cheshire & Fiore 3

Information asymmetry: Used cars After the Before sale… the sale. Buyer Seller Christo's birthday Computer-Mediated Communication — Cheshire & Fiore 4 Images from khulsey. com

Oh no, lemons! Christo's birthday Computer-Mediated Communication — Cheshire & Fiore 5

Open versus Closed Systems Examples: Open Source System (kernel vs. GUI) Wikipedia (are all topics equal? ) Others? Christo's birthday Computer-Mediated Communication — Cheshire & Fiore 6

Christo's birthday Computer-Mediated Communication — Cheshire & Fiore 7

“Reputation” systems Explicit Ratings by others Implicit Derived from behavior Join Date: Mar 2004 Posts: 22 Behavior Christo's birthday Direct experience Computer-Mediated Communication — Cheshire & Fiore 8

+/ – Explicit reputation systems Useful when: – Open system – Identity transient – Exclusion impossible Christo's birthday Useful when: – Closed system – Identity persistent – Coalitions, no alternatives Computer-Mediated Communication — Cheshire & Fiore 9

Findings from Yamagishi et al. 2007 Reputation System Outcome (Independent Variable) (Dependent Variable) -Positive -Price? -Negative -Quality level? -Mixed -Probability of item being sold? -Time to sale? Christo's birthday Computer-Mediated Communication — Cheshire & Fiore 10

Christo's birthday Computer-Mediated Communication — Cheshire & Fiore 11

Quality levels over time Christo's birthday Computer-Mediated Communication — Cheshire & Fiore 12

Levels of “dishonesty” Christo's birthday Computer-Mediated Communication — Cheshire & Fiore 13

Profit vs. Honesty Christo's birthday Computer-Mediated Communication — Cheshire & Fiore 14