Linear approximations to the quadratic almost ideal demand system
Linear approximations to the quadratic almost ideal demand system
复制标题
DOI：
10.1007/s00181-005-0044-3
复制
发表时间：
2006-09-01
影响因子：
3.2
通讯作者：
Matsuda, Toshinobu
中科院分区：
文献类型：
--
作者：
Matsuda, Toshinobu
本文通过提出一个新的复合变量，研究了最近流行的二次几乎理想需求系统（QUAIDS）的线性近似，并进行了仿真研究。当使用非平稳时间序列时，线性近似特别有用，非线性系统很难正确应用。新的复合变量表现良好，与价格指数相结合，适合线性化的几乎理想的需求系统。如果采用复合变量和弹性公式的适当组合，并将基点设置为评估点，则QUAIDS可以在实际基础上线性近似。
This paper investigates linear approximations to the recently popular quadratic almost ideal demand system (QUAIDS) by proposing a new composite variable and conducting a simulation study. The linear approximations are especially useful when one uses nonstationary time series, to which nonlinear systems are difficult to apply properly. The new composite variable performs well in combination with the price indices appropriate for linearizing the almost ideal demand system. The QUAIDS can be linearly approximated on a practical basis if the appropriate combinations of composite variables and elasticity formulas are employed and the base point is set to the point of evaluation.