当一些特定领域的生产使得只能有一个企业达到它的最佳规模时，自然垄断就产生了。
A natural monopoly exists when the optimum size for a firm in some area of production is so large that there is room for only one such firm on the market.
大银行具有规模优势，但银行规模并不是越大越好，最佳规模是位于一定区域之内的。
Big Banks have the advantage of scale, but it's not true to say that the bigger the better. The position of the best scale is in a area instead of on a spot.
本文通过对组织结构的模块化拆分进行定性与定量分析，认为模块分割的最佳规模在边际分割收益等于边际分割成本处达到。
In this paper, we make a qualitative and quantitative analysis of original organizational structure split, pointing out that the optimal size could arrive when marginal cost equals marginal revenue.
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