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RECSM Summer School: Social Network Analysis Pablo Barber a - - PowerPoint PPT Presentation
RECSM Summer School: Social Network Analysis Pablo Barber a - - PowerPoint PPT Presentation
RECSM Summer School: Social Network Analysis Pablo Barber a School of International Relations University of Southern California pablobarbera.com Networked Democracy Lab www.netdem.org Course website: github.com/pablobarbera/big-data-upf
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Moreno, “Who Shall Survive?” (1934)
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Moreno, “Who Shall Survive?” (1934)
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Moreno, “Who Shall Survive?” (1934)
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Christakis & Fowler, NEJM, 2007
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Adamic & Glance, 2004, IWLD
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Email network of a company
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Barbera et al, 2015, Psychological Science
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Social Network Analysis
Today:
◮ Basic concepts ◮ Importing network data into R ◮ Network visualization ◮ Node and network-level summary statistics ◮ Community detection ◮ Network decomposition techniques
Beyond the scope of this course (but ask me!)
◮ Modeling network properties: Exponential random graph
models
◮ Large-scale network visualization with Gephi ◮ Bipartite/Multiplex networks
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Basic concepts
◮ Node (vertex): each of the units in the network
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Basic concepts
◮ Node (vertex): each of the units in the network ◮ Edge (tie): connection between nodes
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Basic concepts
◮ Node (vertex): each of the units in the network ◮ Edge (tie): connection between nodes
◮ Undirected: symmetric connection, represented by lines
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Basic concepts
◮ Node (vertex): each of the units in the network ◮ Edge (tie): connection between nodes
◮ Undirected: symmetric connection, represented by lines ◮ Directed: imply direction, represented by arrows
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Basic concepts
◮ Node (vertex): each of the units in the network ◮ Edge (tie): connection between nodes
◮ Undirected: symmetric connection, represented by lines ◮ Directed: imply direction, represented by arrows
◮ A network consists of a set of nodes and edges
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Basic concepts
A few examples:
◮ Classroom: students / friendships
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Basic concepts
A few examples:
◮ Classroom: students / friendships ◮ Twitter: users / retweets
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Basic concepts
A few examples:
◮ Classroom: students / friendships ◮ Twitter: users / retweets ◮ Academic literature: papers / citations
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Basic concepts
A few examples:
◮ Classroom: students / friendships ◮ Twitter: users / retweets ◮ Academic literature: papers / citations ◮ Internet: websites / hyperlinks
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Basic concepts
A few examples:
◮ Classroom: students / friendships ◮ Twitter: users / retweets ◮ Academic literature: papers / citations ◮ Internet: websites / hyperlinks ◮ Trade: countries / trade flows
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Basic concepts
A few examples:
◮ Classroom: students / friendships ◮ Twitter: users / retweets ◮ Academic literature: papers / citations ◮ Internet: websites / hyperlinks ◮ Trade: countries / trade flows ◮ Biology: neurons / connections
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Basic concepts
Network Visualization
Jennifer Josh Evgeniia Whitney Tom
Adjacency Matrix J J E W T J 1 1 J 1 1 1 E 1 1 W 1 1 1 T 1 1
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