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The changing role of consumers and suppliers in a food safety event: the 2006 foodborne illness outbreak linked to spinach

机译：消费者和供应商在食品安全事件中角色的变化：2006年与菠菜相关的食源性疾病暴发

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This article provides a means for testing whether buyers or sellers are responsible for a drop in sales following a market shock. We show that suppliers' responses dominated the market reaction to the 2006 US Food and Drug Administration warning to avoid fresh spinach contaminated with potentially deadly bacteria Escherichia coli O157:H7. A modified Durbin-Wu-Hausman test for temporary price endogeneity is developed and used in a leafy green vegetable demand model. Test results indicate the price of bagged spinach was exogenous before the announcement but endogenous for approximately 12 weeks afterward. We show these results are consistent with the notion that suppliers temporarily limited the availability of spinach to consumers. Instead of consumers choosing the quantity purchased given exogenous prices, it was suppliers who limited the quantity marketed and consumers' choices established the market price.
机译：本文提供了一种测试买方或卖方对市场震荡后的销售下降负有责任的方法。我们表明，供应商的反应主导了市场对2006年美国食品药品监督管理局警告的反应，以避免新鲜菠菜被潜在致命的细菌O157：H7污染。已开发出一种针对临时价格内生性的改良Durbin-Wu-Hausman检验，并将其用于绿叶蔬菜需求模型。测试结果表明，袋装菠菜的价格在宣布之前是外生的，但在之后的大约12周内是内生的。我们证明这些结果与供应商暂时限制消费者获得菠菜的想法相符。供应商限制了市场销售的数量，而消费者的选择却确定了市场价格，而不是消费者根据给定的外部价格选择购买的数量。

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