If a firm's long-run average total curve shows that it can produce 5,000 DVDs at an average cost of $2.00 and 15,000 DVDs at an average cost of $1.50, this is evidence of

As you move up along a straight-line demand curve,

A) the price elasticity of demand decreases in size. B) the price elasticity of demand increases in size. C) total revenue always decreases. D) total revenue always increases. E) total revenue never changes.

The International Space Station is a joint project of the United States, Russia, Japan, Canada and the European Union. This suggests that _____

a. if the space station is a public good then the optimal size of the sharing group is larger than one country b. each country would have been unable to raise the money to pay for the space station on their own c. there are significant negative externalities involved that should be spread over more individuals d. Australians do not value space exploration