On the Pattern of Migration in the Household: An Explanation through Binomial Law

Household characteristics such as age, size, occupation, socio-economic status, etc. play vital role in deciding the movement of adult members. A study of movement process at the household level is useful for the prediction of future size of the households as well as to study the imbalances in sex-ratio occurred due to such migration. Motivated by the fact that the data related to migration is influenced by the number of the adult members present in household, under certain assumptions some probability models (inflated binomial and beta binomial distributions) have been proposed to describe the migration pattern and it has been applied to the observed distribution of adult migrants from the households among fixed number of adult members present in household. Data have been taken from a survey conducted in the most flooded area of Bihar, India in 2010. Findings reveal that proposed model explains satisfactorily the pattern of rural out migration of Adults from the household. Also we have observed that the risk of migration is increasing with increasing number of adult member in the household.