本文对容易混淆的规模效益不变与拐点进行辨析,讨论了生产函数规模效应及边际生产报酬的直观、简单的图解判别方法,将切线截距与规模效应联立,生产函数的凹凸性与边际生产报酬对应,并给出严格证明,并用例题解释了规模效益不变点与函数凹凸拐点的区别。 In this paper, the confusion of scale efficiency and inflection point are analyzed, and the intuitive and simple method of graphic judgment of scale effect and marginal payoff of production function is discussed. The tangent intercept and scale effect are combined together. The concavity and convexity of the production function and the marginal Corresponding to the production compensation, and give a rigorous proof, and explain the difference between scale invariance and function bump inflection point with the example.