Learn More
A copula is a means of generating an n-variate distribution function from an arbitrary set of n univariate distributions. For the class of portfolio allocators that are risk averse, we use the copula approach to identify a large set of n-variate asset return distributions such that the relative magnitudes of portfolio shares can be ordered according to the(More)
comments of Sandy Clarke and two anonymous referees are appreciated. Abstract Many deficiencies in the capacity of a food system to deliver safe products are systemic in nature. We suggest a taxonomy of four general ways in which a systemic failure might occur. One relates to the connectedness, or topology, of the system. Another arises from mistrust on the(More)
or family status. (Not all prohibited bases apply to all programs.) Persons with disabilities who require alternative means for communication of program information (Braille, large print, audiotape, etc.) should contact USDA's TARGET Center at (202) 720-2600 (voice and TDD). To file a complaint or call (202) 720-5964 (voice and TDD). USDA is an equal(More)
T he advent of large scale cultivation of genetically engineered (GE) varieties has been one of the dominant features of innovation in agriculture over the last 15 yr (Moschini, 2008). Introduced in the late 1990s in some major crops [chiefly soybean and maize but also cotton (Gossypium hirsutum L.) and canola (Brassica napus L.)], GE varietal traits have(More)