Robust Error Specification in a Production System
研究估计供需系统时因变量选择（份额或数量）对估计一致性的影响，提出让数据选择形式的稳健结构，并应用于美国及得克萨斯州农业数据。
Economists estimating demand and supply systems face the question of using shares or quantities as dependent variables. This article finds that inconsistent estimates are obtained if one makes the wrong choice. A robust structure is presented to let the data choose the preferred form. Empirical applications to U.S. and Texas agriculture using the generalized method of moments suggest that shares and quantities are rejected in favor of a more general functional form. The Texas application provides some evidence for fixed capital but not for labor.