作者
D De Angelis, Peter Hall, Geoffrey Arthur Young
发表日期
1993/12/1
期刊
Journal of the American Statistical Association
卷号
88
期号
424
页码范围
1310-1316
出版商
Taylor & Francis Group
简介
Edgeworth and bootstrap approximations to estimator distributions in L1 regression are described. Analytic approximations based on Edgeworth expansions that mix lattice and nonlattice components and allow for an intercept term in the regression are developed under mild conditions, which do not even require a density for the error distribution. Under stronger assumptions on the error distribution, the Edgeworth expansion assumes a simpler form. Bootstrap approximations are described, and the consistency of the bootstrap in the L 1 regression setting is established. We show how the slow rate n −1/4 of convergence in this context of the standard, unsmoothed bootstrap that resamples for the raw residuals may be improved to rate n −2/5 by two methods: a smoothed bootstrap approach based on resampling from an appropriate kernel estimator of the error density and a normal approximation that uses a kernel …
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