Browsing by Author "Oglend, A"

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    Spatial-dynamics of hypoxia and fisheries: The case of Gulf of Mexico brown shrimp
    (Marine Resource Economics, 2014-01-01) Smith, MD; Asche, F; Bennear, LS; Oglend, A
    © 2014 MRE foundation, Inc. All rights reserved.We analyze the Gulf of Mexico brown shrimp fishery and the potential impacts of a large seasonal area of hypoxia (low dissolved oxygen) that coincides with the peak shrimp season. A spatial-dynamic bioeconomic simulation embeds three biological impacts on shrimp: mortality, growth, and aggregation on hypoxic edges. Hypoxia creates feedbacks in the bioeconomic system, altering catch and effort patterns. System changes propagate over space to affect areas that do not experience hypoxia. Areas that might otherwise be considered controls in a natural experiments framework are contaminated by the ecological disturbance through spatial sorting. Aggregate predictions from simulations are similar to empirical fishery data. Average shrimp size and total landings are negatively correlated, as are hypoxic severity and landings. Shrimp size and hypoxic severity are only weakly negatively correlated. Growth overfishing, which varies with recruitment success and ecological disturbances, is a key mediating effect.
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    U.S. shrimp market integration
    (Marine Resource Economics, 2012-06-25) Asche, F; Bennear, LS; Oglend, A; Smith, MD
    Recent supply shocks in the Gulf of Mexico-including hurricanes, the Deepwater Horizon oil spill, and the seasonal appearance of a large dead zone of low oxygen water (hypoxia)-have raised concerns about the economic viability of the U.S. shrimp fishery. The ability of U.S. shrimpers to mediate supply shocks through increased prices hinges on the degree of market integration, both among shrimp of different sizes classes and between U.S. wild caught shrimp and imported farmed shrimp. We use detailed data on shrimp prices by size class and import prices to conduct a co-integration analysis of market integration in the shrimp industry. We find significant evidence of market integration, suggesting that the law of one price holds for this industry. Hence, in the face of a supply shocks, prices do not rise; instead, imports of foreign farmed fish increase.