How did 100,000,000 women disappear?

Two researchers crunching population statistics have confirmed an unsettling reality. Siwan Anderson and Debraj Ray noticed the ratio of women to men in developing regions and in some cultures is suspiciously below the norm.

In India, China and sub-Saharan Africa, millions upon millions of women are missing. They are not lost, but dead: victims of violence, discrimination and neglect.

A University of British Columbia economist is amongst those trying to find them – not the women themselves, who are long gone, but their numbers and ages, which paint a sad and startling picture of gender discrimination in the developing world.

The term "missing women" was coined in 1990, when Indian economist Amartya Sen calculated a shocking figure. In parts of Asia and Africa, he wrote in The New York Review of Books, 100 million women who should be alive are not, because of unequal access to medical care, food and social services. These are excess deaths: women "missing" above and beyond natural mortality rates, compared to their male counterparts.