On Confounding Preference Heterogeneity and Income Effect in Discrete Choice Models
On Confounding Preference Heterogeneity and Income Effect in Discrete Choice Models
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离散选择模型中混杂偏好异质性和收入效应
DOI：
10.1007/s11067-007-9043-6
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发表时间：
2008
影响因子：
2.4
通讯作者：
Juan Dios Ortúzar
中科院分区：
文献类型：
--
作者：
Francisco Javier Amador;Rosa Marina González;Juan Dios Ortúzar
离散选择模型文献的很大一部分是关于说明偏好异质性的规范。相比之下，只有几项研究对收入效应的存在感兴趣，而试图同时解释这两种效应的模型要罕见得多。在这篇文章中，我们使用了一个规范，它解释了收入效应和偏好异质性，既有系统性的，也有随机性的。我们的结果指出，应谨慎对待只单独考虑这些影响的研究得出的结论，因为从经验角度来看，它们可能会令人困惑。事实上，我们提供的经验证据表明，随机成本参数可以解释收入效应的存在。
A substantial part of the discrete choice model literature has been concerned with specifications accounting for preference heterogeneity. In contrast, only a few studies have been interested in the presence of income effect, and it is much rarer still to come across models trying to account for both effects simultaneously. In this paper we use a specification that accounts for income effect and preference heterogeneity, both of a systematic and of a random nature. Our results point out that care should be taken with conclusions drawn from studies that only consider these effects separately, since they can be confounding from an empirical point of view. In fact, we provide empirical evidence that a random cost parameter can account for the existence of income effect.