Market Transactions and Hypothetical Demand Data: A Comparative Study
比较了实际市场交易和假设性调查问卷得出的需求关系，发现两者在统计上无显著差异，为使用假设数据提供了支持。
Abstract Empirical demand studies have been based on data from (a) actual market transactions or (b) hypothetical questions. Many social scientists are skeptical of the accuracy of responses to hypothetical questions, yet few studies assess the quality of this type of data. This article directly compares the demand relations obtained from actual market transactions and hypothetical survey responses using primary field data and limited dependent variable regression analysis. Using a log-likelihood ratio test, the null hypothesis that the two demand relations are statistically identical cannot be rejected at the 1% level of significance.