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首页> 外文期刊>Journal of Agricultural and Applied Economics >Short-Run Demand Relationships in the U.S. Fats and Oils Complex
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Short-Run Demand Relationships in the U.S. Fats and Oils Complex

机译：美国油脂综合体中的短期需求关系

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摘要

Fats and oils play a prominent role in U.S. dietary patterns. Recent concerns over the negative health consequences associated with fats and oils have led many to suspect structural change in demand conditions. Our analysis considers short run (monthly) demand relationships for edible fats and oils. In that monthly quantities of fats and oils are likely to be relatively fixed, an inverse almost ideal demand system specification is used. A smooth transition function is used to model a switching inverse almost ideal demand system that assesses short-run demand conditions for edible fats and oils in the United States. The results suggest that short-run demand conditions for fats and oils experienced a gradual structural shift that began in the late 1980s or early 1990s and persisted into the mid-1990s. Although this shift generally made price flexibilities more elastic, differences in scale flexibilities across regimes were modest in most cases. The results suggest that decreases in marginal valuations for most fats and oils in response to consumption increases are rather small. Scale flexibilities are relatively close to -1, suggesting near homothetic preferences for fats and oils.
机译：油脂在美国的饮食模式中起着重要的作用。最近对与油脂相关的负面健康后果的担忧导致许多人怀疑需求状况的结构变化。我们的分析考虑了食用油脂的短期（每月）需求关系。由于每月的油脂量可能是相对固定的，因此使用了几乎理想的反需求系统规格。平滑过渡函数用于建模近似理想需求的逆转换系统，该系统评估美国食用油脂的短期需求状况。结果表明，对油脂的短期需求状况经历了从1980年代末或1990年代初开始并一直持续到1990年代中期的结构性转变。尽管这种转变通常使价格灵活性更具弹性，但在大多数情况下，跨制度的规模灵活性差异不大。结果表明，随着消费量的增加，大多数油脂的边际估值下降幅度很小。秤的柔韧性相对接近-1，表明对油脂的相似偏好。

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