On Testing the Utility Hypothesis
扩展了显示偏好公理以涵盖劳动供给和投资组合选择，并用完整、细化的数据检验效用假说及偏好可分性假说，避免与其他假说混淆。
In order to be able to conduct a test of the (core) utility hypothesis that is not confounded with tests of (subsidiary) hypotheses that economic agents all have the same preferences and that their preferences are weakly separable, it is necessary to use data that are disaggregated and complete. In order to carry out a utility hypothesis test with complete data, revealed preference theory must first be extended. The generalised axiom of revealed preference is extended to include labour supply and portfolio choice. Then a complete, disaggregated data set is used to test the utility hypothesis and two preference separability hypotheses.