According to the textbook model of the world, rich countries export their capital to poor countries to foster faster growth.

按照教科书里的世界模型，富国向穷国输出资本，以促成更快的增长。

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It is now a standard textbook model in the economics literature.

购买力平价已经成为一个标准的经济学教科书模型。

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The answer is that the aerospace industry does not fit the textbook model of perfect competition.

ECONOMIST: Peace in our time

We were looking for a new model to be able to reduce the cost of acquiring textbooks and, ultimately, it became a textbook rental model.

FORBES: An Interview with Dan Rosensweig of Chegg

Especially if McGraw Hill were to change the textbook publishing model at the same time.

FORBES: Should Barnes and Noble Break Up? Float Off the Nook To Compete With Amazon and Apple?