In the Keynesian model, if aggregate expenditures exceed aggregate output and inventories of firms fall, then the aggregate output and the business sector could be expected to:

Given below are the current account transactions of an economy in a year

a. exported goods and services worth $120 billion b. imported goods worth $200 billion c. revenue earned from manufacturing plants situated abroad equals $80 billion d. dividend paid to foreign investors equals $10 billion e. donations and disaster relief funds given to a foreign country equal $10 billion f. received "gifts" worth $5 billion from foreign donors towards poverty alleviation i) Calculate the economy's trade balance. ii) What will be the balance in the economy's current account?

Which of the following four-firm concentration ratios would be the best indicator of an oligopoly?

A) 0.25 percent B) 31 percent C) 78 percent D) 100 percent E) 11 percent