The Dow Jones Industrial Average is now based on the prices of the stocks of

The economic efficiency of any process will be evaluated by

A) the proportion of marginal to non-marginal costs. B) the ratio of work done to energy supplied. C) comparing what is gained from what is sacrificed. D) the relationship of supply to demand.

Which of the following is true?

A) Much of the trade of the European Union (EU) countries is with EU countries. B) Industrialized countries tend to trade relatively little and largely with developing countries. C) Developing countries in Africa and South America tend to trade the most and largely with themselves. D) All of the above are true.