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Published online by Cambridge University Press: 31 July 2008
Using data from the 1960 US census of population, migrant and non-migrant families are compared, over the period 1955–60, for family size in three residence groups of whites and non-whites. Migrant families in both colour groups are found to have a higher mean number of children under 6 years of age than do the non-migrants and a small differential is maintained even after indirect standardization for age of family head. Non-migrant families have a higher mean number of older children but this excess decreases after standardization. It is concluded that migration does not interfere with childbearing and that, on balance, migrants do not have fewer births.