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Non-Stationary Markov Process Analysis of the Size Distribution of Shrimp Processing Firms in the Southeast United States

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  • The shrimp harvesting sector is the largest component of the Southeastern United States fishing industry, accounting for 57% of the total value of landings in the region in 1996. U.S. shrimp imports were valued at $2.6 billion in 1996. Together, domestic production and imports of raw products support a large shrimp processing sector, which provides several thousand jobs either directly or indirectly. In 1975 and 1984, the United States International Trade Commission investigated the shrimp industry to determine whether the volume of shrimp imports was high enough to threaten domestic firms which were producing articles similar to, or directly competitive with the imported products. In both studies, the commission concluded that no harm was done to the processing sector. However, an analysis of the shrimp processing sector revealed that imports did have a negative impact. The objective of this research is to examine the impact of shrimp processors performance (as measured by processor’s margins) on industry structure (as measured by the number of processing firms in activity) using a non-stationary Markov model. Results indicated significant margins changes on industry structure and size distribution. Specifically, the narrowing of processors’ margins due to increased shrimp imports impacted more the small size firms than the medium or large firms. Additionally, some shrimp processors (medium and large sizes) were able to remain in the industry by adjusting their input mixes.
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  • Diop, H., W.R. Harrison and W.R Kethly JR. Non-Stationary Markov Process Analysis of the Size Distribution of Shrimp Processing Firms in the Southeast United States. In: Microbehavior and Macroresults:Proceedings of the Tenth Biennial Conference of the International Institute ofFisheries Economics and Trade, July 10-14, 2000, Corvallis, Oregon, USA.Compiled by Richard S. Johnston and Ann L. Shriver. InternationalInstitute of Fisheries Economics and Trade (IIFET), Corvallis, 2001.
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  • Johnston, Richard S.
  • Shriver, Ann L.
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  • International Institute of Fisheries Economics and Trade U.S. National Marine Fisheries Service MG Kailis Group
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