India's missing girls: biology, customs, and economic development
综述六岁以下儿童性别比例的国际证据，发现经济发展加剧男孩偏好，印度北部和西部因性别选择性堕胎导致失衡，并分析其对福利和婚姻市场的影响。
We review the evidence on the sex ratio among children below the age of six. International evidence shows that the sex ratio at birth is slightly biased towards boys, but boys suffer greater mortality, a pattern consistent with Darwinian evolution. With economic development, the male bias in the child sex ratio increases. South and East India show levels and trends in the child sex ratio that are consistent with this evidence. However, unbalanced sex ratios in the northern and western states since the first censuses indicate discrimination against girls. Technological developments permitting sex-selective abortions have seriously aggravated the imbalances in these states. Economic modelling of parental choice regarding a child's gender suggests that gender imbalances may be consistent with individual maximization and marriage-market equilibrium. Nevertheless, these choices have adverse welfare consequences, which will be aggravated by the decline in population growth and consequent relaxation of the ‘marriage squeeze’.