The traditional preference for sons may be the main hindrance to India
's current population policy of two children per family. In this study
, the effects of various sociodemographic covariates, particularly sex
preference, on the length of the third birth interval are examined fo
r the scheduled caste population in Assam, India. Life table and hazar
ds regression techniques are applied to retrospective sample data. The
analysis shows that couples having two surviving sons are less likely
to have a third child than those without a surviving son and those wi
th only one surviving son. Age at first marriage, length of preceding
birth intervals, age of mother, and household income have strong effec
ts on the length of the third birth interval.