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首页> 外文期刊>Applied Economics >The effects of price on household demand for food and calories in poor countries: are our databases giving reliable estimates?
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The effects of price on household demand for food and calories in poor countries: are our databases giving reliable estimates?

机译：价格对贫困国家家庭食物和卡路里需求的影响：我们的数据库是否提供可靠的估计？

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Food price policy relies heavily on estimated price elasticities of food demand to help balance the nutritional and economic objectives in poor countries. Economists use either unit values (ratios of household expenditure to quantity purchased) or community prices (enumerated from vendors in local markets) as proxies for market prices when estimating price elasticities with household survey data. Biases are believed to result from using unit values, due to measurement error and quality effects, but evidence on this issue is lacking and even less is known about community prices. This article provides an empirical evidence from Vietnam, which suggests that economists should exercise caution when estimating price elasticities from household surveys. A 14-food demand system is estimated alternatively with unit values or community prices, and the elasticity of calories with respect to rice prices is calculated. This elasticity is more than twice as large (−0.54 versus −0.22) when community prices are used rather than unit values. Hence, conclusions about the nutritional effects of rice price increases appear sensitive to data choices made by economists. More generally, this discrepancy suggests that the household survey databases commonly used by economists may not provide reliable estimates.View full textDownload full textRelated var addthis_config = { ui_cobrand: "Taylor & Francis Online", services_compact: "citeulike,netvibes,twitter,technorati,delicious,linkedin,facebook,stumbleupon,digg,google,more", pubid: "ra-4dff56cd6bb1830b" }; Add to shortlist Link Permalink http://dx.doi.org/10.1080/00036841003781478
机译：粮食价格政策在很大程度上取决于估计的粮食需求价格弹性，以帮助平衡贫困国家的营养和经济目标。在通过家庭调查数据估算价格弹性时，经济学家将单位价值（家庭支出与购买数量的比率）或社区价格（从当地市场的供应商枚举）用作市场价格的代理。由于测量误差和质量影响，人们认为偏差是由于使用单位值引起的，但是缺乏有关此问题的证据，对社区价格的了解甚至更少。本文提供了越南的经验证据，这表明经济学家在根据家庭调查估算价格弹性时应谨慎行事。另外，还可以通过单位价值或社区价格估算出14种食物的需求系统，并计算相对于大米价格的卡路里弹性。当使用社区价格而不是单位价格时，这种弹性要大两倍（0.54比0.22）。因此，关于大米价格上涨的营养影响的结论似乎对经济学家的数据选择敏感。更普遍地说，这种差异表明经济学家常用的住户调查数据库可能无法提供可靠的估算。查看全文下载全文相关变量Delicious，linkedin，facebook，stumbleupon，digg，google，更多”，发布号：“ ra-4dff56cd6bb1830b”};添加到候选列表链接永久链接http://dx.doi.org/10.1080/00036841003781478

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