Partially varying coefficient instrumental variables models

Partially varying coefficient instrumental variables models
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偏变系数工具变量模型

DOI:
10.1111/j.1467-9574.2011.00497.x
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发表时间:
2012-05
影响因子:
1.5
通讯作者:
Huaiyu Xiong
Huaiyu Xiong
中科院分区:
数学4区
文献类型:
--
作者:
Zongwu Cai;Huaiyu Xiong

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本文研究了一类新的半参数工具变量模型,其中结构函数具有部分变系数泛函形式。在此质量标准下,模型在具有未知常数或函数系数的内源性/外源性组分中呈线性。因此,可以避免具有连续内生变量的一般非参数模型中的不适定反问题。我们提出了一个三步估计过程来估计常数和函数系数,并建立它们的渐近性质,如一致性和渐近正态性。我们开发一致的估计,他们的误差方差。我们证明了常系数估计达到最优收敛速度,函数系数估计是预言的。此外,还讨论了参数估计的效率问题,提出了一种简单有效的估计器。建议的程序说明通过蒙特卡洛模拟和应用程序返回到教育。
In this article, we study a new class of semiparametric instrumental variables models, in which the structural function has a partially varying coefficient functional form. Under this specification, the model is linear in the endogenous/exogenous components with unknown constant or functional coefficients. As a result, the ill‐posed inverse problem in a general non‐parametric model with continuous endogenous variables can be avoided. We propose a three‐step estimation procedure for estimating both constant and functional coefficients and establish their asymptotic properties such as consistency and asymptotic normality. We develop consistent estimators for their error variances. We demonstrate that the constant coefficient estimators achieve the optimal ‐convergence rate, and the functional coefficient estimators are oracle. In addition, efficiency issue of the parameter estimation is discussed and a simple efficient estimator is proposed. The proposed procedure is illustrated via a Monte Carlo simulation and an application to returns to education.
DOI: 10.1006/jmva.2001.2013
发表时间: 2002-07
影响因子: 1.6
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