The International Nickel Study Group, which represents producing countries, reckons that supply should come more into line with demand next year.

ECONOMIST: The magnetism of metals

Ivorian rubber output climbed to 250, 000 metric tons in 2012, from 183, 000 tons in 2007, according to the Singapore-based International Rubber Study Group.

WSJ: Chocolate Makers Fight for Farmers' Loyalty

The International Artemisinin Study Group, which includes prominent malaria experts from around the world, examined the results of 16 trials carried out over the past decade.

BBC: NEWS | Health | Drug cocktail 'may beat malaria'

According to a study published in the latest issue of the Journal of Economic Entomology, by Paul van Mele of the Consultative Group on International Agricultural Research and his colleagues, African mango farmers could increase their harvests by as much as two-thirds with the help of these doughty insects.

ECONOMIST: Biological pest control