Ask a Hypothetical Question, Get a Valuable Answer?
通过调查爱荷华州湿地的休闲需求，结合实际使用数据和假设性旅行成本变化下的预期行为，检验两种数据来源的一致性，发现它们在湿地价值和偏好参数上存在显著差异，并讨论了不同学派对结果的解读差异。
The authors model the recreation demand for Iowa wetlands, combining survey data on both actual usage patterns (i.e., revealed preferences) and anticipated changes to those patterns under hypothetical increases in trip costs (i.e., stated preferences). They formulate and test specific hypotheses concerning potential sources of bias in each data type and consistently reject consistency between the two data sources, both in terms of implied wetland values and underlying preference parameters. The authors pay careful attention to the interpretations of the test results, noting particularly how the interpretation of the same results can vary with the "school of thought" of the reader.