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What is Twitter, a Social Network or a News Media?
Speaker: ChinHui Chen
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AgendaIntroduction
Topological Analysis
Ranking Twitter Users
Trending The Trends
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Introduction
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Introduction
Goal:topological characteristics of Twitter its power as a new medium of information sharing.
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First quantitative study on the entire Twitter sphere and information diffusion on it.
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What is twitter?
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FoundedSan Francisco, California,United States
FounderJack DorseyEvan WilliamsBiz Stone
LaunchedJuly 15, 2006
wiki
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Revenue US $150 million (projected 2010)
Alexa rank 9 (March 2011)
Users200 million (March 2011)
Employees450 (2011)
wiki
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Kelly, Ryan, ed (August 12, 2009). "Twitter Study – August 2009"
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Dataset
June 6th - June 31st, 2009
User profiles: 41.7 million
4,262 unique trending topics
Tweets: 106 millions
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Available Online
We make our dataset publicly available online at: http://an.kaist.ac.kr/traces/WWW2010.html
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Topological Analysis
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Basic Analysis
Followers vs. Tweets
Reciprocity
Degree of Separation
Homophily
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Basic Analysis
complementary cumulative distribution function
40 users > a million followers
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Followers / Tweets
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Impact of Retweets
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What’s Retweet?
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Target
How exactly does information spread on Twitter?
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Audience Size of Retweet
Retweet Trees
Temporal Analysis of Retweet
Favoritism in Retweet
Outline
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Audience Size of Retweet
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1. median < avg
-> many tweets have a large number of additional recipients
2. #1000
3. power of retweeting
-> user spread power -> determines important -> collective
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Retweet Trees
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Retweet Trees
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Retweet Trees
height 1 : 95.8%
97.6%
less than 6 degrees of separation, height < 6
no trees > 11 hops
user dist -> power law
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Temporal Analysis
How soon appear / How long last
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Temporal Analysis
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Temporal Analysis
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The strength of Twitter as a medium for information diffusion stands out by the speed of retweets.
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Favoritism in Retweet
kY(k) ~ 1 kY(k) ~ k
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Favoritism in Retweet
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People only retweets from a small number of people and only a subset of a user’s followers actually retweet.
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Realtime Search
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TREC 2011
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TREC 2011
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Thoughts
Buy in
Response
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Tweet -> Product
Users sell Product
Someone buy it
Predict what kind of product will be popular?
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A new UI?
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Thanks