Marginal Changes in Random Parameters Ordered Response Models with Interaction Terms
指出计量软件中交互变量和交互项在随机参数有序响应模型中的边际变化计算有误，推导了正确公式，并通过实例说明错误估计会导致推断偏差。
Marginal changes of interacted variables and interaction terms in random parameters ordered response models are calculated incorrectly in econometric softwares. We derive the correct formulas for calculating these marginal changes. In our empirical example, we observe significant changes not only in the magnitude of the marginal effects but also in their standard errors, suggesting that the incorrect estimation of the marginal effects of these variables as is commonly practiced can render biased inferences on the findings.