Incorporating Generalized Marginal Budget Shares in a Mixed Demand System
扩展了Rotterdam型混合需求系统，用基于Box-Cox变换的广义混合恩格尔曲线替代常数边际预算份额，并以日本果蔬需求为例，发现线性混合恩格尔曲线更符合数据，且错误假设会扭曲弹性估计。
This article extends a Rotterdam type of mixed demand system by replacing its constant marginal budget shares with the ones derived from originally defined and specified mixed Engel curves that take a generalized functional form using the Box‐Cox transformation. An empirical illustration is given for Japanese demand for fresh and processed fruits and vegetables. The results show that the Rotterdam parameterization of marginal budget shares, which corresponds to those in linear mixed Engel curves, is preferred by the data, and that improper assumptions of the form of mixed Engel curves underlying a mixed demand system can bias its elasticities.