In mechanical or engineering terms, an expression of the ratio between energy or power input and output, usually expressed as a percentage. In systems management it is an expression of input to output, but usually assessed as a relative concept and...

see economic...

In the fields of technological innovation, economic development, business management, and public policy planning, as well as in everyday life, efficiency is a pivotal criterion that guides the behavior of both individuals and institutions. The...

Efficiency as a technical term may refer to: Energy efficiency, useful work per quantity of energy Energy conversion efficiency, desired energy output per energy input Energy conservation, reducing the use of energy Electrical efficiency, useful power...

Efficiency-getting the most value from a given amount of resources-is important in a world of scarcity. The more efficient people are, the better off they can make themselves. That's why economists are always talking about efficiency. Unfortunately, what economists have to say on the...

Economic efficiency is the standard that economists use to evaluate a wide range of things. Economists who favor markets argue that they generate outcomes more efficient than do socialism or government regulation. As we shall see in the next few months, economists don't like...

The hybrid-electric Toyota Prius leads the government's annual top-10 fuel economy list of vehicles that can make living with high gas prices a little more tolerable. The 2007 Prius, with 60 miles per gallon in the city and 51 mpg...

The energy efficiency of China's fuel-guzzling economy is improving but the country _ the world's No. 2 oil consumer _ is still struggling to meet self-imposed conservation targets, the government said Tuesday.China launched a five-year campaign in 2006 to cut energy use per unit of...