By contrast, persistent shortages of silica, needed to make solar panels, have kept the solar energy sector from taking off on a similar trajectory.

There are persistent shortages of common foodstuffs.

Yet the persistent shortage of home-grown technology workers to fill these high-skill, high-wage jobs does suggest that something is amiss in the labor market.

Texas and New York among other states with large numbers of immigrant children also face persistent shortages of biligual teachers.

The town has suffered from persistent shortages of water supply, despite several forceful attempts by the women of the town to improve the situation.

In 1947 the problem of persistent shortages turned into a crisis.

The persistent shortage has also been costly for health plans whose patients have turned to prescription heartburn medication because of the shortage.

Increases, however, would, have been significantly greater without diseases and a persistent shortage of animal feed.

When a country has a persistent shortage of foreign exchange, two kinds of policy question arise.

Despite persistent shortages of consumer goods, the various national economies grew and living standards rose - until the 1980's.