First, we wanted to know whether this was a long-term demand we had tapped into and the answer was undoubtedly yes.

One of the problems, the industry argues, is that forecasting the level of supplies needed to keep up with long-term demand can be tricky.

Eventually, thanks to the long-term demands of consolidated highway management, tolls will no more than double.

"We know, for example, that aging baby boomers will drive long-term demand for health care services and equipment."

But the long-term demand for high-technology services is expected to increase, particularly in international markets.

That was a shift from Saudi Arabia's traditional strategy of keeping prices low to foster long-term demand for oil.

Prices drop for coins that are not in long-term demand, and increase along with a coin's perceived or intrinsic value.

There is no effort to reduce the long-term demand for electricity.

Predicting long-term demand for commodities is notoriously difficult.

The Saudis were alarmed that a lower quota might push prices up too fast, slowing world growth and the long-term demand for oil.