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首页> 外文期刊>ICES Journal of Marine Science >Reconstruction of global ex-vessel prices of fished species
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Reconstruction of global ex-vessel prices of fished species

机译：重建全球捕捞品种的船外价格

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摘要

Economic dimensions of global fishery analyses are often limited by unavailable or inconsistent ex-vessel price data from the world's fishing nations. We describe a novel method for estimating ex-vessel price time series for individual species by converting export prices of fishery commodities into ex-vessel prices and pairing these with species. The method relies exclusively on global, publicly-available data from the Food and Agricultural Organization of the United Nations (FAO). National datasets of ex-vessel prices are not used as inputs for the method, but comparisons of reconstructed ex-vessel prices with actual prices from national datasets showed strong correspondence. Correlation coefficients for paired reconstructed prices and actual prices of the same species were typically between 0.60 and 0.75 annually in the past two decades. There was a tendency for reconstructed prices to be less variable than actual prices, over-estimating actual prices at low values of actual prices and under-estimating actual prices at high values, likely the result of incomplete price transmission or assigning a given price time series to multiple species. However, there was no evidence of overall bias between reconstructed prices and actual prices, and correlations were strongest for comparisons involving multiple taxonomic groups. The method described carries advantages of global comprehensiveness and consistency across countries in reconstructed ex-vessel prices, reflecting the comprehensiveness and consistency of export price information. The method described links to species from the global FAO landings database, but can be modified to pair with other species lists or to focus on specific regions or countries. Data tables and source code are publicly available and ex-vessel price estimates can be updated annually following annual releases of the FAO fishery commodities database.
机译：全球渔业分析的经济规模通常受到来自世界捕鱼国家的现有或不一致的船外价格数据的限制。我们描述了一种通过将渔业商品的出口价格转换为容器前价格并将其与物种配对来估算单个物种的容器前价格时间序列的新方法。该方法仅依赖于联合国粮食及农业组织（FAO）提供的全球公开数据。全国前船运价格数据集未用作该方法的输入，但将重构后的前航船价格与国家数据集的实际价格进行比较显示出很强的对应性。在过去的二十年中，相同物种的成对重建价格与实际价格的相关系数通常每年在0.60至0.75之间。有一种趋势，即重构价格的可变性低于实际价格，低估实际价格时高估了实际价格，高估了价格时低估了实际价格，这很可能是价格传递不完全或分配给定价格时间序列的结果到多个物种。但是，没有证据表明重构价格与实际价格之间存在总体偏差，对于涉及多个分类组的比较，相关性最强。所描述的方法在重构后的出厂价格中具有全球全面性和国家间一致性的优势，反映了出口价格信息的全面性和一致性。描述的方法与粮农组织全球登陆数据库中物种的链接，但可以进行修改，使其与其他物种清单配对，或者着眼于特定区域或国家。数据表和源代码是公开可用的，并且在每年发布粮农组织渔业商品数据库之后，可以每年更新前船价格估计。

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