Given the intrinsically sequential nature of child birth, timing of a child's birth has consequences not only for itself, but also for its older and younger siblings. The paper argues that prior and posterior spacing between consecutive siblings are thus important measures of intensity of...

Introduction -- Background on population sex ratio -- Conceptual framework -- Research methods -- Characteristics associated with male birth proportion -- The effect of prenatal sex selection on mortality -- The effect of prenatal sex selection on health care and morbidity -- Discussion and...