Estimating Engel curves under unit and item nonresponse
利用欧洲健康、老龄化与退休调查数据，提出一个同时处理单位无应答、项目无应答、内生性和灵活函数形式的统计模型，估计食品恩格尔曲线，并比较参数与半参数方法。
SUMMARY This paper estimates food Engel curves using data from the first wave of the Survey on Health, Aging and Retirement in Europe (SHARE). Our statistical model simultaneously takes into account selectivity due to unit and item nonresponse, endogeneity problems, and issues related to flexible specification of the relationship of interest. We estimate both parametric and semiparametric specifications of the model. The parametric specification assumes that the unobservables in the model follow a multivariate Gaussian distribution, while the semiparametric specification avoids distributional assumptions about the unobservables. Copyright © 2011 John Wiley & Sons, Ltd.