What Happens to Patterns of Food Consumption when Food Prices Change? Evidence from A Systematic Review and Meta-Analysis of Food Price Elasticities Globally
What Happens to Patterns of Food Consumption when Food Prices Change? Evidence from A Systematic Review and Meta-Analysis of Food Price Elasticities Globally
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DOI：
10.1002/hec.3107
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发表时间：
2015-12-01
期刊：
影响因子：
2.1
通讯作者：
Smith, Richard D.
中科院分区：
文献类型：
--
作者：
Cornelsen, Laura;Green, Rosemary;Smith, Richard D.
近年来，人们对研究食品价格对食品消费和随后的健康后果的影响产生了相当大的兴趣。针对不健康食品相对价格的财政政策经常被提出，作为解决肥胖症流行的方法。相反，各种粮食补贴干预措施被用来试图减少营养不良的程度。关于价格弹性的信息对于理解食品价格的这种变化如何影响食品消费至关重要。至关重要的是，不仅要了解自身价格弹性，还要了解交叉价格弹性，因为食品替代模式可能对政策建议产生重大影响。虽然自有价格弹性在分析食品价格变化对健康的影响时很常见，但交叉价格效应即使得到普遍承认，在分析中却很少涉及，特别是在公共卫生文献中。这篇文章系统地回顾了关于交叉价格弹性的全球证据，并提供了对低收入、中等收入和高收入国家的七种食品类别的综合估计，以及先前估计的自有价格弹性。在低收入国家，粮食价格的变化对自身价格的影响最大。交叉价格效应更加多种多样，而且根据国家收入水平的不同，可以加强、削弱或减轻自身价格效应。版权所有(C)2014 John Wiley&Sons，Ltd.
Recent years have seen considerable interest in examining the impact of food prices on food consumption and subsequent health consequences. Fiscal policies targeting the relative price of unhealthy foods are frequently put forward as ways to address the obesity epidemic. Conversely, various food subsidy interventions are used in attempts to reduce levels of under-nutrition. Information on price elasticities is essential for understanding how such changes in food prices affect food consumption. It is crucial to know not only own-price elasticities but also cross-price elasticities, as food substitution patterns may have significant implications for policy recommendations. While own-price elasticities are common in analyses of the impact of food price changes on health, cross-price effects, even though generally acknowledged, are much less frequently included in analyses, especially in the public health literature. This article systematically reviews the global evidence on cross-price elasticities and provides combined estimates for seven food groups in low-income, middle-income and high-income countries alongside previously estimated own-price elasticities. Changes in food prices had the largest own-price effects in low-income countries. Cross-price effects were more varied and depending on country income level were found to be reinforcing, undermining or alleviating own-price effects. Copyright (c) 2014 John Wiley & Sons, Ltd.