The No—Choice Alternative in Conjoint Choice Experiments
The No—Choice Alternative in Conjoint Choice Experiments
复制标题
联合选择实验中的无选择方案
DOI：
10.1177/147078530104300105
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发表时间：
2001
影响因子：
3
通讯作者：
M. Wedel
中科院分区：
文献类型：
--
作者：
W. Kamakura;R. Haaijer;M. Wedel
联合选择设计在实践中经常被应用，并且通常会在设计中添加一个基础备选方案。当这样一个“无选择”的基础替代品存在于联合选择实验中时，当效应类型和/或线性编码用于属性水平时，应将一个常数项添加到具有属性虚拟的设计（“X”-）矩阵中。不包括这样的常数可能会导致模型和预测拟合低得多，甚至对（线性）属性的有偏估计。
Conjoint choice designs are frequently applied in practice, and often a base alternative is added to the design. When such a 'no-choice' base alternative is present in conjoint choice experiments a constant term should be added to the design ('X'-) matrix with attribute dummies when effects type and/or linear coding is used for the attribute levels. Not including such a constant may result in a much lower model and predictive fit and even biased estimates for the (linear) attributes.