In 2012, approximately what income level was the cut-off point for defining a family as "rich"?

Which of following groups of countries are all advanced economies?

A) Australia, Brazil, and the United States B) Hong Kong, Japan, France, and the United Kingdom C) Italy, the United States, China, and Russia D) Singapore, Russia, France, and Chad E) Mexico, Canada, Germany, and Egypt

A firm's cost can decrease for each of the following reasons, EXCEPT:

a. an increase in productivity due to experience. b. an improvement in productivity of capital employed. c. an improvement in work environment and quality of management. d. an increase in input prices.