中文摘要：

产业经济学常用投入产出方法中的影响力系数和感应度系数来评价部门的拉动和推动作用，从而作为确定国民经济中关键部门最重要的参考指标。本文针对影响力系数和感应度系数的缺陷，采用灰色关联度曲线相似的思想对中国1997年17部门的投入产出表作了实证分析，并和传统的方法作了比较，结果表明，用本方法确定关键部门更符合实际，具有重要的参考价值。

英文摘要：

The response coefficient and influence coefficient in input-output method are often used to appraise the tensile and impulse action of each sector and identify the key sectors in industrial economics. In this paper, aimed at the defect of the response coefficient and influence coefficient, grey interconnect degree analysis is applied to inverse Leontief coefficients of input-output table. With this method we analyze the sectors＇ relevancy to define the key sectors of national economy in the input-output table of seventeen sectors of China in 1997. The results show that this method in this paper has more value in application.