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从事统计工作的人,对动态相对数计算公式可以说是太熟悉了。人们常用的计算公式是(为简便计,这里先省略百分号,式中a0为基期水平,a1为报告期水平,下同):但许多统计人员在计算利润一类动态指标时,对由盈转亏、由亏转盈或增亏减亏等情况不知怎样处理才好。上述情况能不能计算速度值呢?对这个问题,1984年就有专家在《统计》(《中国统计》前身)杂志上发表过文章,提出了通用计算公式。以后又有不少学者讨论过这类问题。笔者经过长期思考和探索,试就动态相对数的通用计算公式进行论证。
People engaged in statistical work, dynamic relative formula can be said to be too familiar with the formula. People commonly used formula is (for simplicity, here omitted the percent sign, where a0 for the base level, a1 for the reporting period level, the same below): But many statisticians in the calculation of a dynamic index of profit, by the Profit and loss, profit or loss reduction or loss reduction, etc. I do not know how to handle it. In this case, in 1984, some experts published articles in the magazine “Statistics” (predecessor of “China Statistics”) and put forward a general formula for calculating the above values. Since then, many scholars have discussed such issues. After long-term thinking and exploration, the author tries to demonstrate the general formula of dynamic relative number.