The Asymptotic Variance of Semi-parametric Estimators with Generated Regressors
The Asymptotic Variance of Semi-parametric Estimators with Generated Regressors
复制标题
具有生成回归量的半参数估计量的渐近方差
DOI:
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发表时间:
2010
期刊:
影响因子:
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通讯作者:
G. Ridder
中科院分区:
文献类型:
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作者:
J. Hahn;G. Ridder
We study the asymptotic distribution of three-step estimators of a finite dimensional parameter vector where the second step consists of one or more nonparametric regressions on a regressor that is estimated in the first step. The first step estimator is either parametric or non-parametric. Using Newey’s (1994) path-derivative method we derive the contribution of the first step estimator to the influence function. In this derivation it is important to account for the dual role that the first step estimator plays in the second step non-parametric regression, i.e., that of conditioning variable and that of argument. We consider three examples in more detail: the partial linear regression model estimator with a generated regressor, the Heckman, Ichimura and Todd (1998) estimator of the Average Treatment Effect and a semi-parametric control variable estimator.