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First ACM International Conference on Web Search and Data Mining - WSDM 2008

Preferential Behavior in Online Groups

author: Jasmine Novak, Yahoo! Research

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*Slides*
0:00	Preferential Behavior in Online Groups
0:10	Power Users
1:02	Executive Summary of Preferential Treatment
1:37	Outline
2:02	Outline - Introduction to online groups
2:04	Online Groups
2:22	Yahoo Groups
2:58	Privacy and Size
3:34	Yahoo Groups
3:44	Outline - Experimental set-up
3:47	Engaged Users & Thriving Groups
4:20	Thriving Groups
4:47	k-Cores
5:15	Outline - Statistic of Group 'Cores'
5:22	Core Size
6:22	Fraction of Posters in Core
6:49	Time Spent in Core
7:58	Half-life of Cores
8:34	Core Populations
9:18	Outline - Statistic of heavily engaged users
9:25	Long Core Users Across Groups
10:13	Multiple Memberships
10:53	Outline - Preferential treatment of engaged users
11:00	Preferential Treatment of Engaged Users
11:16	Response to Newcomer
12:11	Response to Core Members
12:43	Response Probability by Newcomer Type
13:38	Long-core Response Probability
14:19	Summary of Preferential Treatment
14:27	First Post Types
15:53	Pregnancy-and-pups: Coccidiosis
16:06	skatefans: Appropos of Barbara Cook
16:19	Outline - Model: Predicting deep engagement
16:26	Modeling Long-Core Engagement
16:54	Model (1)
17:54	Model (2)
18:46	Analytical Results
19:22	Improvement Using Group Factor
19:51	Fin
20:32	Fin++

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