The Comparative Advantage Theory of David Ricardo is constructed on a series of assumptions including perfect competition and constant returns to scale.
李嘉图的比较优势理论是建立在完全竞争与规模报酬不变等一系列假设条件之下的。
Modern growth theory is largely built on models with constant or increasing returns to reproducible factors as a result of the accumulation of knowledge.
现代增长理论主要是建立在模型不变或增加收益的基础上，最重现性的因素是知识的累积。
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