Beyond CES: Three Alternative Classes of Flexible Homothetic Demand Systems
Beyond CES: Three Alternative Classes of Flexible Homothetic Demand Systems
复制标题
超越 CES：灵活同势需求系统的三种替代类别
DOI：
10.2139/ssrn.3015279
复制
发表时间：
2017
期刊：
影响因子：
--
通讯作者：
Philip Ushchev
中科院分区：
文献类型：
--
作者：
Kiminori Matsuyama;Philip Ushchev
我们刻画了三类需求系统，它们都是非参数定义的：具有单个集合子的同质需求系统(HSA)、具有直接隐加性(HDIA)的同质需求系统(HDIA)和具有间接隐加性(HIIA)的需求系统。在HSA中，所有交叉价格效应由一个价格聚合器捕获，而在HDIA和HIIA中，它们由两个价格聚合器捕获。这三个类中的每一个都包含CES作为特例。然而，它们是两两不相交的，唯一的例外是CES。因此，这些同类需求系统为我们提供了三种脱离CES的替代方式。
We characterize three classes of demand systems, all of which are defined non-parametrically: homothetic demand systems with a single aggregator (HSA), those with direct implicit additivity (HDIA), and those with indirect implicit additivity (HIIA). In HSA, all the cross-price effects are captured by one price aggregator, while in HDIA and in HIIA, they are captured by two price aggregators. Each of these three classes contains CES as a special case. Yet, they are pairwise disjoint with the sole exception of CES. Thus, these classes of homothetic demand systems offer us three alternative ways of departing from CES.