Six types of distributions were distinguished. The third study focused on relationship between different types of mobility in urban centres of varying size. Spatial distribution of individual forms of mobility can be used as a basis for delimitating the migration regions. Migration and Fertility in Thailand, 1960-1970. The present research takes advantage of data from sample tapes of the 1960 and especially the 1970 Censuses of Thailand to analyze the fertility behaviour of migrants to Bangkok in relation to that of migrant women in smaller urban places and in rural areas.
Fertility is measured in terms of total number of children ever born.
The findings indicate almost no difference between the fertility levels of lifetime migrants and those of natives at place of destination. Overriding the differences by migration status are the urban-rural differentials.