Examination of Two Sources of Error in the Estimation of Net Internal Migration*
净国内迁移估计中两类误差的考察
Two sources of errors in the estimation of net internal migration are examined. First, errors arising from the use of a single set of survival rates in all 48 states are examined by estimating net migration in ten states using both a national life table and state life tables. It is estimated that the median error arising from this source is about 14 per cent of the estimate of net migration. The second source of error examined is underenumeration of the population. The…