IMAGINE you are one half of a young couple expecting your first child in a fast-growing, poor country. You are part of the new middle class; your income is rising; you want a small family. But traditional mores hold sway around you, most important in the preference for sons over daughters. Perhaps hard physical labour is still needed for the family to make its living. Perhaps only sons may inherit land. Perhaps a daughter is deemed to join another family on marriage and you want someone to care for you when you are old. Perhaps she needs a dowry.
Killed, aborted or neglected, at least 100m girls have disappeared (The Economist)