In 1947, the largest brewer in the U.S., Schlitz, had a 4.57 percent share of the domestic market.(Anheuser-Busch was number four in those days).The top ten brewers, including the number one brewer, had 29.29 percent of the domestic market.Over 70 percent of the domestic market was controlled by "all other" brewers.By the year 2001 the largest brewer was Anheuser-Busch, with a 54.76 share of the domestic market.The top ten brewers held 97.04 percent share of the domestic market in 2001.Thus, the brewing industry in the U.S.became a(n) _____ market structure.

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The brewing industry in the U.S. became an oligopoly by 2001, as indicated by the concentration of market share in the hands of a few large firms (Anheuser-Busch and the top ten brewers holding 97.04 percent of the domestic market).

In 1947, the Largest Brewer in the U