Some forms of environmentalism has generated many positive responses from concerned communities. Sophisticated theories addressing various aspects of environmental policy abound. At the practical level private economic agents following their self-interests confront the challenge of cleaning up...

The illicit dealing in gemstones (including diamonds) is a fast growing activity in African countries which produce these minerals. Zaire and Angola are two extreme examples, but by no means exceptions. The preferred policy efforts to controlling the flow of illicit trade in gems have been...