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Meta-Frontier Analysis of Intensive and Semi-Intensive Fish Farms in Ghana

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Abstract
  • This study considers a cross sectional data of 210 farms to analyze the technical efficiency levels of intensive and semi-intensive fish farms in Ghana using the meta-frontier approach. This technique takes into consideration farms that operate under different technologies. It estimates technology gap that measures output from the frontier production function for the individual systems relative to the potential output that is defined by the meta-frontier function. The study finally identifies the determinants of technical efficiency. The results reveal that the intensive system of fish farming exhibit increasing return to scale, whilst the semi-intensive system exhibit decreasing return to scale. The combined effect of operational and farm specific factors are identified to influence technical efficiency of both systems although individual effects of some variables are not significant. The mean technical efficiency relative to the meta-frontier is estimated to be 0.68 for the intensive system and 0.79 for the semi-intensive farms. The study concludes that the semi-intensive system of fish farming is more technically efficient than the intensive system. However, increase in the scale of production in the intensive system to take advantage of economics of scale may enhance efficiency of production.
  • Keywords: The Economics of Aquaculture Production and Profitability Part I, Fisheries Economics, Fish & Aquaculture Sectors' Development
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  • Onumah, E. Meta-Frontier Analysis of Intensive and Semi-Intensive Fish Farms in Ghana. In: Visible Possibilities: The Economics of Sustainable Fisheries, Aquaculture and Seafood Trade: Proceedings of the Sixteenth Biennial Conference of the International Institute of Fisheries Economics and Trade, July 16-20, Dar es Salaam, Tanzania. Edited by Ann L. Shriver. International Institute of Fisheries Economics and Trade (IIFET), Corvallis, 2012.
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  • AQUAFISH, USAID, NEPAD Planning and Coordination Agency, Norad, The World Bank, Hyatt Regency Dar es Salaam, NAAFE, World Wildlife Fund, United Nations University Fisheries Training Programme, ICEIDA, JICA, JIFRS, The European Association of Fisheries Economists, International Seafood Sustainability Foundation
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