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英文文献：A Sample Selection Approach To Censored Demand Systems-截尾需求系统的样本选择方法
英文文献作者：Yen, Steven T.,Lin, Biing-Hwan
英文文献摘要：
A censored demand system estimator is proposed by extending the sample selection model of Heckman. Censoring is governed by a selection mechanism which avoids the restricitve Tobit parameterization. Results of application to household consumption of beverages suggest the estimator produces slightly different elasticity estimates from the Tobit estimator. Demands for beverages are nearly unitary elastic, and net substitution is an obvious pattern.
通过对Heckman样本选择模型的扩展，提出了一种截尾需求系统估计器。截尾由选择机制控制，避免了限制Tobit参数化。应用于家庭饮料消费的结果表明，该估计器产生的弹性估计与Tobit估计器略有不同。对饮料的需求几乎是单一弹性的，净替代是一个明显的模式。
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