Therefore, on the demand side, all of the forces described above are both engines of economic growth and sources of increases in the relative productivity of more educated workers and, thus, the relative demand for those workers.
In a mountain community where real estate is both economic engine and gossip mill, the question of the buyer's identity has fueled intrigue.
My estimate is that during the next 20 years, China will contribute at least a half billion additional people to the global middle class, which is both the engine and benefit of economic growth.
Energy is both an engine of development and a source of many of today's economic and environmental problems.
Launched last November, Boutiques.com is both a search engine for all things fashion and is a personalized storefront of boutiques curated by celebrites, stylists, and designers.
Down!" Since forming Deer Tick in Providence, R.I., late in 2004, Mr. McCauley has been both its engine and its engineer.
The airplane, he felt, was both an engine of perspective and a symbol of unity.
The City, London's financial center, was both the engine and the symbol of London's long boom.
Unlike automobile racers, however, cyclists are both the engine and the drivers of their machines, and they measure their power output in kilojoules or watts instead of horsepower.
Telephones have been both an engine of social disruption and a focus for technological anxiety ever since their invention.
