Goldman N
Demography. 1978 Nov;15(4):499-507.
Based on stable population theory, a mathematical relationship is developed between the intrinsic rate of increase (r) of a population and the ratio (Z) of the average number of younger sisters ever born to the average number of older sisters ever born, for a random sample of women in the population. This mathematical formula is then converted into a technique for estimating r from data on numbers of sisters. The extent to which the technique may be generalizable to actual populations is discussed.
基于稳定人口理论，针对人群中随机抽取的女性样本，推导出人口内在增长率（r）与姐妹出生顺序平均数量之比（Z）（即曾出生的妹妹平均数量与曾出生的姐姐平均数量之比）之间的数学关系。然后将此数学公式转化为一种根据姐妹数量数据估算r的方法。文中还讨论了该方法在实际人群中的推广程度。
