Little evidence is available to assess the effect of substituting occupation-based income scores for individual incomes before 1940. The example of immigrant assimilation in Canada 1911–31 reveals differences in the extent and even the direction of assimilation depending on whether income scores are used and how the occupational income score is constructed. Given the increasingly wide use of income scores, we summarize a number of procedures to address the limitations associated with the absence of individual level income variation. An adjustment of conventional income scores for either group earnings differences and/or intertemporal change using summary information for broad groups of occupations reduces the deviation between scores and actual incomes.

几乎没有证据可用来评估以职业为基础的收入得分代替1940年前的个人收入的影响。加拿大1911–31年移民同化的示例显示，同化程度和方向的差异取决于是否使用收入得分和职业收入分数是如何构建的。鉴于收入得分的用途越来越广泛，我们总结了许多程序来解决与个人水平的收入差异不相关的局限性。使用针对广泛职业类别的摘要信息，针对组收入差异和/或跨期变更来调整常规收入得分，可以减少得分和实际收入之间的偏差。