1. Coye Cheshire & Andrew Fiore June 21, 2015 // Computer-Mediated Communication Reputation (Part I)

2. 6/21/2015Computer-Mediated Communication — Cheshire & Fiore1 Freq. Random PartnerFixed Partner One-shot interaction  Email solicitations  Email attachments from unknown sources Iterated interaction  Peer-to-peer digital goods exchange  Online “pick-up” games (e.g., cards)  Online communities  Online auctions  Chat programs  Massively multiplayer games Continuity Internet situations by frequency & continuity

3. 6/21/2015Computer-Mediated Communication — Cheshire & Fiore2 Trust Networks Under Uncertainty “Trust Networks”  System view  Ego-centric view

4. 6/21/2015Computer-Mediated Communication — Cheshire & Fiore3 What are the Solutions to Uncertainty in CMC Environments? Proxies and ‘inferred trustworthiness’ Institutional backing Closed Systems versus Open Systems  Experiential, often negative- only reputations (not explicit) 3 rd party (explicit) reputation

5. 6/21/2015Computer-Mediated Communication — Cheshire & Fiore4 Information asymmetry: Used cars Images from khulsey.com Buyer Seller Before the sale… After the sale.

6. 6/21/2015Computer-Mediated Communication — Cheshire & Fiore5 Oh no, lemons!

7. 6/21/2015Computer-Mediated Communication — Cheshire & Fiore6 Open versus Closed Systems Examples: Open Source System (kernel vs. GUI) Wikipedia (are all topics equal?) Others?

8. 6/21/2015Computer-Mediated Communication — Cheshire & Fiore7

9. 6/21/2015Computer-Mediated Communication — Cheshire & Fiore8 “Reputation” systems Explicit Implicit Behavior Ratings by others Derived from behavior Join Date: Mar 2004 Posts: 22 Direct experience

10. 6/21/2015Computer-Mediated Communication — Cheshire & Fiore9 + – Explicit reputation systems / Useful when: – Open system – Identity transient – Exclusion impossible Useful when: – Closed system – Identity persistent – Coalitions, no alternatives

11. 6/21/2015Computer-Mediated Communication — Cheshire & Fiore10 Findings from Yamagishi et al. 2007 Reputation System (Independent Variable) -Positive -Negative -Mixed Outcome (Dependent Variable) -Price? -Quality level? -Probability of item being sold? -Time to sale?

12. 6/21/2015Computer-Mediated Communication — Cheshire & Fiore11

13. 6/21/2015Computer-Mediated Communication — Cheshire & Fiore12 Quality levels over time

14. 6/21/2015Computer-Mediated Communication — Cheshire & Fiore13 Levels of “dishonesty”

15. 6/21/2015Computer-Mediated Communication — Cheshire & Fiore14 Profit vs. Honesty