Jenn and Jeff's PPFs     For Jenn, the opportunity cost of a page is two images. For Jeff the opportunity cost of a page is 1/2 an image. Thus, Jenn has a comparative advantage in image production, while Jeff has a comparative advantage in page production.

    If Jenn spends all her time producing images, she can turn out 50 in a month, while Jeff could only produce 30. On the other hand, Jeff could produce 60 pages in a month if that were all he produced, but in the same time period Jenn could produce only 25 pages. In this case Jenn has an absolute advantage in image production and Jeff has an absolute advantage in page production, but the source of the comparative advantage lies in the difference in opportunity cost, not the absolute advantage.

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