英文文献：A Latent Variable Mimic Approach To Inferring The Quality Of Life-一种潜在变量模拟方法来推断生活质量
英文文献作者：Rahman, Tauhidur,Mittelhammer, Ronald C.,Wandschneider, Philip R.
英文文献摘要：
This paper makes three principal contributions. First, we propose a new estimator for the unobservable variable models with endogenous causes. We show that under factor analysis type of assumptions, Robinson and Ferrara (1977)'s procedure is not fully efficient, and a more efficient procedure can be obtained by merging Robinson and Ferrara' procedure with that in Joreskog and Goldberger (1975) procedure. The asymptotic properties of the new estimator are compared with these two estimators and results indicate that, with our mixture approach, significant efficiency gains can be achieved. Second, we model the Quality of life (QOL) as an unobservable or latent link variable between observable causes and observable effects, which mitigates problem of bias, inconsistency, and arbitrary weightings of explanatory factors. Third, we estimate and compare QOL indices for 43 countries for the year 1990s, noting differences between countries and over time.

本文有三个主要贡献。首先，我们提出了一个新的不可观测变量模型的估计器。我们发现，在因子分析类型的假设下，Robinson和Ferrara(1977)的方法并不是完全有效的，通过将Robinson和Ferrara方法与Joreskog和Goldberger(1975)的方法合并，可以得到一个更有效的方法。将新估计量的渐近性质与这两个估计量进行了比较，结果表明，用我们的混合估计量，可以获得显著的效率增益。其次，我们将生活质量(QOL)建模为可观察原因和可观察结果之间不可观察的或潜在的联系变量，这减轻了解释因素的偏差、不一致和任意权重的问题。第三，我们估计和比较了43个国家在1990年代的生活质量指数，注意到不同国家和不同时期的差异。