Only one entry will be accepted per person and entries will not be returned.

BBC: [an error occurred while processing this directive]

But a piece of research just published in the Proceedings of the National Academy of Sciences by Paola Sapienza of Northwestern University, near Chicago, suggests an alternative that it is not a person's sex, per se, that is the basis for discrimination, but the level of his or her testosterone.

ECONOMIST: Women, testosterone and finance

Declining GDP would not, in itself, be much of a worry, provided that output per person continued to rise.

ECONOMIST: The future of Japan

For example, 42% of female online gamers socialize with friends and family in person at least once per day versus 31% of females who do not play online games.

FORBES: Connect

Looking further ahead, if China's consumption of raw materials and energy per person were to rise to rich countries' levels, the world simply would not have the resources to supply them.

ECONOMIST: A hungry dragon