An e-product can be digitally encoded then transmitted rapidly, accurately and cheaply.

An experience good or service must be sampled before the user knows its value.

Information overload arises when the volume of available information is large but the cost of processing it is high. Screening devices are then very valuable.

Switching costs arise when existing costs are sunk. Changing supplier then incurs extra costs.

A network externality arises when an additional network member conveys benefits to those already on the network.

A two-part tariff levies an annual charge to cover fixed costs, and a small price per unit related to marginal cost.

Versioning is the deliberate creation of different qualities to facilitate price discrimination.

Bundling is the joint supply of more than one product to reduce the need for price discrimination.

A strategic alliance is a blend of co-operation and competition in which a group of suppliers provides a range of products that partly complement one another.

A standard is the technical specification that is common throughout a particular network.

An asset price bubble is a departure of the price from that justified by fundamental characteristics of the asset. Bubbles are self-fulfilling prophecies.