计算社会经济现象在一定时期的平均发展速度,常用的方法有水平法和累计法。其中水平法因其计算简便而得到广泛应用。但在某些场合,如经济变动起幅较大的时期,用水平法计算的结果难以反映事物真实的平均发展变化程度,此时宜用累计法计算,只是累计法计算要解一元高次方程的根,现行《社会经济统计学原理》教科书大都介绍查表法,在缺乏计算表的情况下难以使用。这里给出一种简便的计算方法。假定按平均发展速度(X推算的各期发展水平理论数值总和等于各期发展水平实际数值总和,即 Calculate the average rate of social economic development over a period of time, commonly used methods are horizontal and cumulative method. The horizontal method is widely used because of its simple calculation. However, in some occasions, such as the time when the economic change is relatively large, the result calculated by the horizontal method can hardly reflect the real average change of things. In this case, it is appropriate to use the cumulative method, Roots, the current “Principles of Socio-Economic Statistics” textbooks mostly introduce the look-up table method, which is difficult to use in the absence of a calculation sheet. Here is a simple calculation method. Assuming that the average growth rate (X projections of the various stages of the theoretical value of the total number of stages equal to the sum of the actual value of the level of development, namely