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Recent work by Kahn, McConnell and Perez-Quiros (2002) has argued that improvements in information technology and inventory management are the chief source of the decline in output volatility since 1984. A key piece of evidence in support of their argument is the decline in the variance of production relative to the variance of sales. This paper(More)
Ant colonies can reproduce by two strategies: independent foundation, wherein the queen starts a new colony alone, and dependent foundation, in which workers assist the queen. In the queenless species Dinoponera quadriceps (Santschi), the colony reproduces obligatorily by fission, a type of dependent foundation, but this process is not well understood. This(More)
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