Networks such as ethnic credit associations, close-knit residential neighborhoods, "old boy' networks, and ethnically linked businesses play an important role in economic life but have been little studied by economists. These networks are often supported by cultural distinctions between insiders...

The relationship between money and credit is developed in terms of "know-who" networks. It is suggested that the link between dynamics and equilibrium theory in economics can be built by regarding the noncooperative no-credit and the general equilibrium models as providing lower and upper bounds...

A number of recent studies have focused on the statistical properties of networked systems such as social networks and the World-Wide Web. Researchers have concentrated particularly on a few properties which seem to be common to many networks: the small-world property, power-law degree...

The random graph of Erdos and Renyi is one of the oldest and best studied models of a network, and possesses the considerable advantage of being exactly solvable for many of its average properties. However, as a model of real-world networks such as the Internet, social networks or biological...