O'Hare W
Demography. 1976 Aug;13(3):369-79.
A new method of making population estimates is introduced and contrasted to the standard ratio-correlation method. The new method, called the "difference-correlation method," produced population estimates for the counties of Michigan which had a smaller mean percentage error than estimates produced by the ratio-correlation method. The differences of proportions which are used in the difference-correlation method will always have means of zero, while the ratios used in the ratio-correlation method have means which vary. Higher intercorrelations among the variables and increased temporal stability of the intercorrelations are two advantages of using differences rather than ratios.
一种新的人口估计方法被引入，并与标准的比率相关法进行了对比。这种新方法被称为“差异相关法”，它得出的密歇根各县人口估计值的平均百分比误差，比比率相关法得出的估计值要小。差异相关法中使用的比例差异均值总是为零，而比率相关法中使用的比率均值则各不相同。变量间更高的相互关联性以及相互关联性在时间上更强的稳定性，是使用差异而非比率的两个优势。
