Two New Features in Discrete Choice Experiments to Improve Willingness-to-Pay Estimation That Result in SDR and SADR: Separated (Adaptive) Dual Response
提出分离双重响应和分离自适应双重响应两种新方法，通过分离强制与自由选择问题并自适应筛选信息量大的问题，提高支付意愿估计的准确性，并通过模拟和实证研究验证其优势。
Discrete choice experiments such as choice-based conjoint and dual response are popular preference elicitation methods, yet, they can suffer from context effects, extreme response behavior, and problems with estimating consumers’ willingness to pay accurately when the purchase probability is high. This study proposes two new features to avoid these limits: (a) strictly separating all forced and all free choice questions and (b) an adaptive mechanism to select fewer, but more informative, free choice questions. The use of these two features invokes two new discrete choice experiment methods: separated dual response (SDR), with just the first feature, and separated adaptive dual response (SADR), with both features. A conceptual comparison, simulation study, tests to address endogeneity concerns, and three empirical studies demonstrate the appeal of these two new features, relative to the benefits of existing discrete choice experiments, especially when estimating willingness to pay. Data, as supplemental material, are available at http://dx.doi.org/10.1287/mnsc.2015.2367 . This paper was accepted by Pradeep Chintagunta, marketing.