What does the term efficiency in economics mean?

What happens to the quantity of lemons demanded as the price increases? What is the GDP of the Sahel? Is Martha Stewart married? Is ten percent fair for an art piece being sold or mass produced for a multimillionaire company? What contributed to the growth in business in the 1920's? What is the equivelent of 7.95 dollars into pounds? What is the object of the study of economics? Are milk prices regulated by government? Which is the most important attribute for comparing countries? What prices are paid for the use of economic resources? How did the embargo act affect imports and exports? Why did farmers want greenback currency? What is the major difference between the classical model and the Keynesian model? Is when union and company officials meet to discuss the terms of the workers new contract? Describe the law of supply and demand and explain how increases and decreases in supply and demand affect prices? What are the four types of trade barries? According to economic intelligence unit maximum amount of foreign direct investment is received by? How the increasing manufacturing cycle time efficiency by reducing non-value added activities can help to reduce cost increase efficiency and increase the quality of product? Scarcity implies that the allocation scheme chosen by society can? How do people contribute to the supply of credit in the economy?