Network shapes

Wikispeedia

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Pareto principle

In 1906 Vilfredo Pareto noted 80% of the land in Italy was owned by 20% of the population.

egs of 80/20?

Sturgeon’s law

90% of everything is crap

Long tail

Long tail

egs of long tail?

Sarnoff’s law

The value of (broadcast) network is proportional to the number of viewers: N.

Content is king.

Metcalfe’s law

The value of (telecommunications) networks is proportional to the number of potential transactions: N2.

Metcalfe-Network-Effect

Reed’s law

The value of (social) networks is proportional to the number of possible groups: 2N.

Network value??

10 50 100
Sarnoff (N)
Metcalfe (N2)
Reed (2N)

Network value

10 50 100
Sarnoff (N) 10 50 100
Metcalfe (N2) 100 2500 10000
Reed (2N) 1024 1.125x1015 1.2677x1030

Social capital

Social capital

The benefits of networks of trust and norms of reciprocity.

Social capital ties

Personal learning network

TED Talk

Obesity and happiness

Conclusion