Government regulation of agricultural markets sometimes provides incentives that conflict with the government policy objectives. This paper is based on the 1984/85 grain market situation in Senegal. It discusses the potential impacts of regulatory uncertainty on activities of different market...

Experimentally it has been found that any two people in the world, chosen at random, are connected to one another by a short chain of intermediate acquaintances, of typical lenth about six. This phenomenon, colloquially referred to as the "six degrees of separation", has been the subject of a...

Life has existed on the Earth for more than three billion years. Until the Cambrian explosion about 540 million years ago however, it was restricted mostly to single-celled micro-organisms that were, for the most part, poorly preserved in the fossil record. From the Cambrian explosion onwards,...

B.W. Marion and the NC-117 Committee