Sean Collins

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Money demand modelsoverpredicted M2 growth in theUnited States from 1990 to 1993. We examine this overprediction using a model ofhousehold demand for liquid wealth. The model is a dynamic generalization ofthe almost-ideal demand model ofDeaton and Muellbauer (1980). We find that the own-price elasticity ofmoney demand rose substantially after 1990. We also(More)
In this paper we describe the impact of the abandonment of traditional farming practices on butterflies and their habitats in traditional, often montane, pastoral systems. We link these declines to socioeconomic factors: illustrating how the failure of the CAP to support traditional farming leads to structural changes in farming enterprises—features which(More)
Capacity constraints limit the profits of some investment strategies, while other strategies are more scalable. We develop a dollar-weighted return measure that parses the factor timing by investors and a strategy’s capacity constraints. We find that actively managed funds exhibit significant capacity and timing effects, while index funds display only(More)
Journal of Plant Registrations, Vol. 5, No. 1, January 2011 1 Further improvements in sorghum pollinator parents are critical to the long-term future and production of grain-sorghum hybrids. The improvement of sorghum pollinator parents has slowed in the past 10 yr, primarily due to the reduction in the number and size of sorghum breeding programs in the(More)
Journal of Plant Registrations, Vol. 5, No. 1, January 2011 1 Further improvements in sorghum seed parents are critical to the long-term future and production of both grainand forage-sorghum hybrids. In the past, sorghum seed-parent development has lagged behind sorghum pollinator-parent development for various reasons that include, but are not limited to,(More)
When electrical engineers are conducting research and development, they often require preliminary testing of their new circuit design. This requires a small production of printed circuit boards (PCBs) to be produced. This could lead to outsourcing to a board house, which adds time and cost to the project. Our goal is to develop a low-cost PCB printer, using(More)
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