Second-order refinements for t-ratios with many instruments
Second-order refinements for t-ratios with many instruments
复制标题
使用多种仪器对 t 比进行二阶细化
DOI:
10.1016/j.jeconom.2021.07.006
复制
发表时间:
2022
影响因子:
6.3
通讯作者:
Y. and T. Otsu
中科院分区:
文献类型:
--
作者:
Matsushita;Y. and T. Otsu
This paper studies second-order properties of the many instruments robust t-ratios based on the limited information maximum likelihood and Fuller estimators for instrumental variable regression models with homoskedastic errors under the many instruments asymptotics, where the number of instruments may increase proportionally with the sample size n, and proposes second-order refinements to the t-ratios to improve the size and power properties. Based on asymptotic expansions of the null and non-null distributions of the t-ratios derived under the many instruments asymptotics, we show that the second-order terms of those expansions may have non-trivial impacts on the size as well as the power properties. Furthermore, we propose adjusted t-ratios whose approximation errors for the null rejection probabilities are of order O (n− 1) in contrast to the ones for the unadjusted t-ratios of order O (n− 1/2), and show that these adjustments induce some desirable power properties in terms of the local maximinity. Although these results are derived under homoskedastic errors, we also establish a stochastic expansion for a heteroskedasticity robust t-ratio, and propose an analogous adjustment under slight deviations from homoskedasticity.
登录
查看更多内容
影响因子:
3.7
作者:
N. Kunitomo
通讯作者:
N. Kunitomo
DOI:
10.2307/1913711
发表时间:
1989
期刊:
影响因子:
--
作者:
K. Morimune
通讯作者:
K. Morimune
DOI:
--
发表时间:
2009
期刊:
Journal of Econometrics (印刷中,)
影响因子:
--
作者:
Anderson;T. W.; Naoto Kunitomo and Yukitoshi Matsushita
通讯作者:
T. W.; Naoto Kunitomo and Yukitoshi Matsushita
影响因子:
6.1
作者:
P. Phillips
通讯作者:
P. Phillips
DOI:
10.2307/1911356
发表时间:
1988
期刊:
影响因子:
--
作者:
T. Rothenberg
通讯作者:
T. Rothenberg