Trophic Portfolios In Marine Fisheries: A Step Towards Ecosystem Management
Marine ecologists warn that humans are "fishing down marine food webs." To explore the economic implications of this phenomenon, this paper applies portfolio theory to aggregate fisheries data. It poses two definitions of a sustainable mean-variance catch frontier. It computes a mean-variance frontier for catch using UNFAO historical fisheries data. Finally, the paper discusses the historical trend in inefficiency.
|Date of creation:||2003|
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- Steven C. Blank, 2001. "Producers get Squeezed up the Farming Food Chain: A Theory of Crop Portfolio Composition and Land Use," Review of Agricultural Economics, Agricultural and Applied Economics Association, vol. 23(2), pages 404-422.
- Andrea Beltratti & Graciela Chichilnisky & Geoffrey Heal, 1993. "Sustainable Growth and the Green Golden Rule," NBER Working Papers 4430, National Bureau of Economic Research, Inc.
- Baldursson, Fridrik Mar & Magnusson, Gudmundar, 1997. " Portfolio Fishing," Scandinavian Journal of Economics, Wiley Blackwell, vol. 99(3), pages 389-403, September.
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