In a long-run equilibrium where firms have identical costs, it is possible that some firms in a competitive market are making a positive economic profit

What is the value of the intra-industry trade index for an industry in which exports are $100 million and imports are $100 million?

a. 100/200 = 0.50 b. (100 + 100)/100 = 2.00 c. 100/[1/2 × (100 + 100)] = 1.00 d. (100 - 100)/100 = 0.00

If you own 10% of the shares of a corporation's stock, and the corporation is expected to earn $9 million a year in after-tax profits forever, and the interest rate is 0.05, what is the value of your shares?

a. $18 million b. $900,000 c. $9 million d. $6 million e. $180 million