Suppose you read the 2004 Census of Manu factures in Canada and noted four-firm concentration ratios and Herfindahl-Hirschman indexes for the following oligopolistic industries:

Which one represents the most unbalanced oli gopoly? Explain. Can you determine from the data which of the leading firms in sports equip ment and railroads has the highest percentage of industry sales? Explain.

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CONCENTRATION RATIO 80 80 80 40 HHI 3,607 2,270 1,400 337 INDUSTRY LUMBER SHIPBUILDING RAILROAD SPORTS EQUIPMENT