Heckman James J, Schmierer Daniel
University of Chicago, University College Dublin, Cowles Foundation, Yale University, and the American Bar Foundation.
Econ Model. 2010 Nov 1;27(6):1355-1367. doi: 10.1016/j.econmod.2010.07.019.
This paper examines the correlated random coefficient model. It extends the analysis of Swamy (1971), who pioneered the uncorrelated random coefficient model in economics. We develop the properties of the correlated random coefficient model and derive a new representation of the variance of the instrumental variable estimator for that model. We develop tests of the validity of the correlated random coefficient model against the null hypothesis of the uncorrelated random coefficient model.
本文研究了相关随机系数模型。它扩展了斯瓦米(1971年)的分析,斯瓦米开创了经济学中的不相关随机系数模型。我们推导了相关随机系数模型的性质,并得出了该模型工具变量估计量方差的一种新表示形式。我们针对不相关随机系数模型的原假设,开发了检验相关随机系数模型有效性的方法。