链梯法由于其简易性和几乎不需任何假设的特点，成为了基于流量三角形对未决赔款准备金进行预测的最常用方法。
Because of the property of simplicity and distribution-free, the chain ladder method has become the most popular method of claims reserving.
基于一般的流量三角形，我们在第二章中提出了乘法模型及边际和估计，并证明了在该模型下，参数的边际和估计就是链梯法估计。
Based on generalized run-off triangle, we introduce multiplicative model and its marginal-sum estimation in chapter 2. We get that the marginal-sum estimation is the chain ladder estimation.
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