[The marital-migrational structure of the rural and urban populations of the Marii El republic].

: The marital-migrational structure of five districts of the Marii El Republic was studied on the basis of marital records. The average values of ethnic marriage assortativeness were 1.18, 1.89, 1.53, and 1.44 for the rural Mari, rural Russian, urban Mari, and urban Russian populations, respectively. The coefficient of migration into the republic for Maris was low (no more than 0.046). The local Malecot inbreeding coefficient was found to be resistant to the changes in the sample size; the correlation coefficient was 0.83. The endogamy indices for the urban and rural Mari populations varied from 0 to 0.04 and from 0.5 to 0.9, respectively. These values for the urban and rural Russian populations varied from 0.06 to 0.24 and from 0.3 to 0.9, respectively. The rate of Mari-Russian (MR) mixing was estimated.