Niemi J K, Lehtonen H, Pietola K, Lyytikäinen T, Raulo S
MTT Agrifood Research Finland, Economic Research, Luutnantintie 13, FI-00410 Helsinki, Finland.
Prev Vet Med. 2008 May 15;84(3-4):194-212. doi: 10.1016/j.prevetmed.2007.12.006. Epub 2008 Jan 22.
Rapid structural change and concentration of pig production in regions with most intensive production has raised concerns about whether the risk of large-scale disease losses has increased in Finland. This paper examines the pig industry's losses due to classical swine fever (CSF) epidemics. The work is based on economic and epidemiological models providing insights to the consequences of epidemics to infected and uninfected farms, government and meat processing. The economic analysis was carried out by use of a sector model, which simulated the recovery of pig production, starting from the recognition of the disease in the country and ending at a steady-state market equilibrium about 12 years later. The model explicitly took into account profit-maximising behaviour of producers and the effects of decrease in export demand. Epidemiological evidence suggests that under the current spatially diversified structure of Finnish pig farming and related industries, the probability of a severe disease epidemic counting dozens of infected farms is small. Even for epidemics considered large in Finland (5-33 infected farms) combined with a major reduction in export demand, the median loss was simulated to be only euro19.2 million. The majority of these losses were due to loss of exports corresponding almost 20% of pig meat production in Finland. While the current structure of pig farming in Finland incurs higher production costs than the most intensive structures in Europe, it also seems to decrease the probability of 'catastrophic' economic losses. The results suggest that the response of export markets and the number of uninfected farms affected by preventive measures are critical to the magnitude of losses, as they can amplify losses even if only few farms become infected.
养猪业在生产最密集的地区迅速发生结构变化并趋于集中,这引发了人们对芬兰大规模疫病损失风险是否增加的担忧。本文研究了猪产业因经典猪瘟(CSF)疫情造成的损失。这项工作基于经济和流行病学模型,这些模型为疫病对受感染和未受感染农场、政府及肉类加工的影响提供了见解。经济分析是通过一个部门模型进行的,该模型模拟了猪生产的恢复情况,从该国确认疾病开始,到约12年后达到稳定的市场均衡结束。该模型明确考虑了生产者的利润最大化行为以及出口需求下降的影响。流行病学证据表明,在芬兰目前养猪业及相关产业空间多元化的结构下,出现涉及数十个受感染农场的严重疫病流行的可能性很小。即使是在芬兰被视为大规模的疫情(5 - 33个受感染农场)并伴有出口需求大幅下降的情况下,模拟得出的中位数损失仅为1920万欧元。这些损失大部分是由于出口损失造成的,几乎相当于芬兰猪肉产量的20%。虽然芬兰目前的养猪结构比欧洲最密集的结构生产成本更高,但它似乎也降低了“灾难性”经济损失的可能性。结果表明,出口市场的反应以及受预防措施影响的未受感染农场数量对损失规模至关重要,因为即使只有少数农场被感染,它们也可能放大损失。