Social Network
Three yuan closure: Basic characteristics of social network structure
- Trinity closure: if two people do not know each had a mutual friend, so they know the possibility is high.
- Capacity: The more common friends, the greater the likelihood.
- Quality: the closer the relationship between mutual friends, the greater the likelihood.
Three yuan closure with static structure of social networks: aggregation and Embeddedness
- aggregation : the higher clustering coefficient, the more the central figure
Clustering coefficient: A pair of adjacent nodes in the number of neighboring nodes interconnected logarithmic / A may be connected
- embedding of : a number of common neighbors side ends
Embed the stronger sex, the more trust and stability.
- highlights here!
The connection relationship between the two groups (shortcut), tend to be weak ties.
Internal high-density group is often a strong relationship.
Launched ternary closure theoretical conclusions of these two social networks constitute a basic structure of a basic explanation of macro:
Social networks are connected by strong ties Group of weak ties.
- a large number of nodes embedded in low sexual relations as well as have the characteristics of what?
- structural holes (i.e. a cut point in a narrow sense, the broad side of the insert associated therewith low)
- Structural Holes meaning:
- It has the "power" on the structure of its neighboring nodes
- Redundancy (Redundant cohesion and structural redundancy bits) smaller structural holes, the more social capital (right)
Three yuan closure node attributes and Social Network Evolution: homogeneity principle
- the homogeneity of the core issue: select OR influence
Is because of the similarity and interaction (selection), or because exchanges and similar (social influence)?
- homogeneity evolution model: Schelling (schelling) model
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Dynamic Model with Quarantine (1972): Isolation is the inevitable result of the dynamic evolution
- Micro and macro motivation results (1978, 2005)
Three yuan closure relationship attributes and social network evolution: equilibrium theory
Small world and scale-free: macro picture of social networks
to sum up
The biggest gain:
Strong ties Group 1. Social networks are connected by weak ties, structural holes redundancy smaller, more social resources.
2.80% homogeneity can cause the system is chaotic disarray.