The Ricardian dynamics are based on the study of the order of cultivation when demand increases. Piero Sraffa criticized David Ricardo for having assumed that the incoming method is defined by a natural order, and stressed that the law of succession of methods is based on a profitability criterion. Then, in the case of intensive cultivation, the question is whether the incoming method is indeed more productive than the one it replaces. Sraffa’s argument relies on the positivity of rent. However, there is a flaw in his reasoning, and a failure of the Ricardian dynamics is possible. Post-Sraffian scholars have misunderstood that construction and have substituted a static approach for it. The critiques they address to Sraffa are better understood by returning to Ricardo and Sraffa’s own methodology. Fifty years ago, mathematicians rediscovered Ricardo’s approach independently and worked out a powerful algorithm inspired by it.

中文翻译：

---

李嘉图和李嘉图的修炼顺序

李嘉图动力学基于对需求增加时的种植顺序的研究。Piero Sraffa 批评 David Ricardo 假设传入方法是由自然顺序定义的，并强调方法继承法则基于盈利标准。然后，在精耕细作的情况下，问题是传入的方法是否确实比它所替代的方法更有生产力。斯拉法的论点依赖于租金的积极性。然而，他的推理存在缺陷，李嘉图动力学的失败是可能的。后 Sraffian 学者误解了这种结构，并用静态方法代替了它。回到李嘉图和斯拉法自己的方法论，可以更好地理解他们对斯拉法的批评。五十年前，