In economics and business, a network effect (also called network externality or demand-side economies of scale) is the effect that one user of a good or service has on the value of that product to other people. When network effect is present, the value of a product or service is dependent on the number of others using it.
The classic example is the telephone. The more people own telephones, the more valuable the telephone is to each owner. This creates a positive externality because a user may purchase a telephone without intending to create value for other users, but does so in any case. Online social networks work in the same way, with sites like Twitter, Facebook, and Google+ being more useful the more users join.
The expression "network effect" is applied most commonly to positive network externalities as in the case of the telephone. Negative network externalities can also occur, where more users make a product less valuable, but are more commonly referred to as "congestion" (as in traffic congestion or network congestion).
Over time, positive network effects can create a bandwagon effect as the network becomes more valuable and more people join, in a positive feedback loop.
Read more about Network Effect: Origins, Benefits, Technology Lifecycle, Lock-in, Types of Network Effects, Negative Network Effects, Open Versus Closed Standards, Examples
Famous quotes containing the words network and/or effect:
“A culture may be conceived as a network of beliefs and purposes in which any string in the net pulls and is pulled by the others, thus perpetually changing the configuration of the whole. If the cultural element called morals takes on a new shape, we must ask what other strings have pulled it out of line. It cannot be one solitary string, nor even the strings nearby, for the network is three-dimensional at least.”
—Jacques Barzun (b. 1907)
“To say that a man is vain means merely that he is pleased with the effect he produces on other people. A conceited man is satisfied with the effect he produces on himself.”
—Max Beerbohm (18721956)