Passel J S
Demography. 1976 Aug;13(3):397-409.
Estimates of the American Indian population under 20 years of age on April 1, 1970, based on birth and death statistics for a 20-year period, show a possible net undercount of 6.9 percent for this age group in the 1970 census. However, for some particular ages the estimates indicate net overcounts in the census. Likewise, the net increase of the entire American Indian population as measured by the difference between the 1960 and 1970 censuses is 67,000 greater than the natural increase for the decade. Detailed analysis of cohort data with respect to the possible causes of the differences between the estimates and the census figures indicate that a portion of the estimated net overcounts can be attributed to classification, as well as coverage, problems. The estimated net overcounts offer support for the hypothesis that many individuals who were registered as white at birth and who were counted as white in the 1960 census shifted their racial self-identification from white to American Indian during the 1960's.
根据20年期间的出生和死亡统计数据得出的1970年4月1日20岁以下美国印第安人口估计数显示，在1970年人口普查中，该年龄组可能存在6.9%的净漏计情况。然而，对于某些特定年龄，估计数表明人口普查中存在净多计情况。同样，根据1960年和1970年人口普查的差异衡量，美国印第安人口的净增长比该十年的自然增长多67,000人。对队列数据关于估计数与普查数字之间差异的可能原因进行的详细分析表明，估计的净多计情况部分可归因于分类以及覆盖范围问题。估计的净多计情况支持了这样一种假设，即在1960年出生时登记为白人且在1960年人口普查中被计为白人的许多人在20世纪60年代将其种族自我认同从白人转变为美国印第安人。
