渔业管理中确定贴现率的一种近似方法

AN APPROXIMATE METHOD ESTIMATED THE DISCOUNT RATE FOR FISHERY MANAGEMENT

在渔业决策时,要事先确定贴现率(δ),用它来折衷长期利益和短期利益。本文报导了事先确定δ的近似方法,如下:x~*=1/2K(1-D)+C/2pq(1+D),D是表示当前利益的%,其他符号的定义见本文。再由x~*确定δ。我们以黄渤海区兰点鲅为例,详细讨论了这个问题。

On the stratagic decision of fishery management the discount rate with which a long-term profit and a short-term profit can be compromised must be determined in advance. But there is no method to fix it. In the paper an approximate method of estimating the discount rate have heen developed, the expression as follow: x_D~*=A/2(1-D)+C/2P_q(1+D) Where the D is defined as a short-term profit, rang of value from 0 to 1, 0≤D ≤1. The other symbols in the expression have been defined in the paper. The discount rate can be obtained from x_D~* with the traditional method. These problems had been discussed in detail, with example of spanish mackerel in the areas of the Yellow sea and Pohai sea.