The multiplier effect is a major feature of networks and flows. It arises regardless of the particular nature of the resource, be it goods, money, or messages.

The measure of performance of any given agent is the amount of money it accumulates through its actions.

When a new building block is discovered, the result is usually a range of innovations.

Particular individuals do not recur, but their building blocks do.

The multiplier effect is a major feature of networks and flows. It arises regardless of the particular nature of the resource, be it goods, money, or messages.

Looking back to data, we can see if the consequences are plausible; looking forward to theory, we can see if general principles are suggested.

From the point of view of physics, it is a miracle that [seven million New Yorkers are fed each day] without any control mechanism other than sheer capitalism.