摘要翻译:
本文提出了一个两阶段最小二乘估计,其第一阶段是在一个完全子集上的等权平均,即完全子集平均(CSA)2SLS。通过Nagar(1959)展开式导出了近似均方误差(MSE)作为子集大小$K$的函数。子集大小是通过最小化近似MSE的样本对应体来选择的。我们证明了该方法在不同子集大小的估计量类之间达到了渐近最优性。为了处理在一组不断增长的不相关的工具上的平均,我们推广了近似的MSE,发现最优的$K$比其他的更大。大量的仿真实验表明,当仪器相关时,CSA-2SLS估计器的性能优于交替估计器。作为实证说明,我们估计了Berry,Levinsohn和Pakes(1995)中的物流需求函数,发现CSA-2SLS估计比替代估计更能得到经济理论的支持。
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英文标题:
《Complete Subset Averaging with Many Instruments》
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作者:
Seojeong Lee and Youngki Shin
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最新提交年份:
2020
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分类信息:
一级分类:Economics 经济学
二级分类:Econometrics 计量经济学
分类描述:Econometric Theory, Micro-Econometrics, Macro-Econometrics, Empirical Content of Economic Relations discovered via New Methods, Methodological Aspects of the Application of Statistical Inference to Economic Data.
计量经济学理论,微观计量经济学,宏观计量经济学,通过新方法发现的经济关系的实证内容,统计推论应用于经济数据的方法论方面。
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一级分类:Statistics 统计学
二级分类:Methodology 方法论
分类描述:Design, Surveys, Model Selection, Multiple Testing, Multivariate Methods, Signal and Image Processing, Time Series, Smoothing, Spatial Statistics, Survival Analysis, Nonparametric and Semiparametric Methods
设计,调查,模型选择,多重检验,多元方法,信号和图像处理,时间序列,平滑,空间统计,生存分析,非参数和半参数方法
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英文摘要:
We propose a two-stage least squares (2SLS) estimator whose first stage is the equal-weighted average over a complete subset with $k$ instruments among $K$ available, which we call the complete subset averaging (CSA) 2SLS. The approximate mean squared error (MSE) is derived as a function of the subset size $k$ by the Nagar (1959) expansion. The subset size is chosen by minimizing the sample counterpart of the approximate MSE. We show that this method achieves the asymptotic optimality among the class of estimators with different subset sizes. To deal with averaging over a growing set of irrelevant instruments, we generalize the approximate MSE to find that the optimal $k$ is larger than otherwise. An extensive simulation experiment shows that the CSA-2SLS estimator outperforms the alternative estimators when instruments are correlated. As an empirical illustration, we estimate the logistic demand function in Berry, Levinsohn, and Pakes (1995) and find the CSA-2SLS estimate is better supported by economic theory than the alternative estimates.
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PDF链接:
https://arxiv.org/pdf/1811.08083