From the data of the 1989 Bangladesh Fertility Survey, aggregate death
s reported at ages 0-12 and 13-60 months are used to estimate infant a
nd child mortality. Multivariate analysis shows that preceding birth i
nterval length, followed by survival status of the immediately precedi
ng child, are the most important factors associated with differential
infant and child mortality risks; sex of the index child and mother's
and father's education are also significant. Demographic factors are i
nfluential during infancy as well as childhood, but social factors, pa
rticularly mother's and father's education, now emerge as significant
predictors of infant mortality risks. This indicates a change in the r
ole of socioeconomic factors, since the earlier Bangladesh Fertility S
urvey in 1975.