The difference between old-economy and new-economy companies is that the latter are often unprofitable, and thus crash and burn when venture capitalists pull out their cash.
But for the typical investor who holds most of his stock market wealth in a pension fund or retirement account, it is often difficult or unprofitable to withdraw money from these accounts for spending before retirement.
The most obvious way of doing this at present is through some kind of part-time work, but this is often made discouragingly hard and unprofitable.
In practice, "people's mining" areas are rarely set aside and, when they are, they are often in unprofitable places, says Bardolf Paul, the executive director of a foundation that works with the miners.
American Airlines is often the only American carrier to many islands and tends to cut unprofitable routes with little warning.
The large-scale isolation of drugs is often hindered by the low amount of material produced by the natural source, and the complexity of the molecules makes their total chemical synthesis costly to unprofitable.
The latest speculation in small technology stocks extends beyond Internet isues, but it is concentrated on companies that are often small and unprofitable.
These firms are often big and unprofitable.
