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In page Edith Penrose:
"Penrose is considered to be the first economist who posited what has become known as the resource-based view of the firm. Strategic resources are those that are rare, difficult to duplicate, valuable, and over which a firm has control. Resources can be raw materials, such as a gold mine or oil well, or intellectual, such as patents, and even trademarks and brands (such as the valuation of the Coca-Cola brand).[citation needed]
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