Linearizing the inverse quadratic almost ideal demand system
Linearizing the inverse quadratic almost ideal demand system
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DOI：
10.1080/00036840600825779
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发表时间：
2007-02
影响因子：
2.2
通讯作者：
Toshinobu Matsuda
中科院分区：
文献类型：
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作者：
Toshinobu Matsuda
本文研究了逆二次几乎理想需求系统(IQUAIDS)的线性逼近问题，IQUAIDS是最近引入的一种具有潜在用途的柔性函数形式。将这种非线性模型线性化具有重要的实际意义，因为在线性模型中可以更恰当地处理可能用于逆需求系统的非平稳数据。通过将两个聚集器函数替换为若干可选数量指数和新的复合变量，IQUAIDS被线性化。对日本生鲜食品需求的应用结果表明，IQUAIDS可以在弹性方面以足够的精度线性化。
This article investigates the linear approximation to the inverse quadratic almost ideal demand system (IQUAIDS), a recently introduced flexible functional form with potential usefulness. Linearizing this nonlinear model is of practical importance because nonstationary data, which are likely to be used in inverse demand systems, can be handled more properly in linear models. The IQUAIDS is linearized by replacing the two aggregator functions with a number of alternative quantity indices and new composite variables. The results of an application to Japanese fresh food demand suggest that the IQUAIDS can be linearized with adequate accuracy in terms of elasticities.