Other things the same, an increase in domestic prices raises the real exchange rate

At free-trade prices, a tennis racquet in Country A, a small country, sells for $100 and contains $40 worth of aluminum inputs and $30 worth of plastic. In Country A, the nominal tariff rates are 40 percent on tennis racquets, 20 percent on aluminum, and 10 percent on plastic. Based on this information, what is the effective rate of protection for the racquet industry in Country A?

A. 10% B. 40% C. 133?% D. 96?%

The measure of concentration in an industry that takes the sum of the squares of the market shares of each firm in the industry is called _______________.

Fill in the blank(s) with the appropriate word(s).