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John D. Rockefeller gained an almost total monopoly over the oil industry by controversial methods. Not only did he fully integrate the industry both vertically and horizontally, he also undercut his competition in price, sold the oil at different prices to different buyers, and offered secret transportation.

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9y ago
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10y ago

By using economies of scale to crush opposition.

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Q: How did John D Rockefeller strengthen his control over the oil industry?
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