A Sample Selection Approach to Censored Demand Systems
将多元样本选择模型扩展到部分选择的非线性方程组，并应用于中国家庭肉类消费，发现弹性估计与传统方法不同，中国肉类产品总体互补但部分存在净替代。
The multivariate sample selection model is extended to a nonlinear equation system with partial selection and applied to household meat consumption in China. Elasticity estimates differ from those obtained from conventional maximum likelihood and Tobit estimates. Chinese meat products are gross complements while net substitution also exists in some cases.