## The Annals of Statistics

- Ann. Statist.
- Volume 10, Number 1 (1982), 212-225.

### Estimated Sampling Distributions: The Bootstrap and Competitors

#### Abstract

Let $X_1, X_2, \cdots, X_n$ be i.i.d random variables with d.f. $F$. Suppose the $\{\hat{T}_n = \hat{T}_n(X_1, X_2, \cdots, X_n); n \geq 1\}$ are real-valued statistics and the $\{T_n(F); n \geq 1\}$ are centering functionals such that the asymptotic distribution of $n^{1/2}\{\hat{T}_n - T_n(F)\}$ is normal with mean zero. Let $H_n(x, F)$ be the exact d.f. of $n^{1/2}\{\hat{T}_n - T_n(F)\}$. The problem is to estimate $H_n(x, F)$ or functionals of $H_n(x, F)$. Under regularity assumptions, it is shown that the bootstrap estimate $H_n(x, \hat{F}_n)$, where $\hat{F}_n$ is the sample d.f., is asymptotically minimax; the loss function is any bounded monotone increasing function of a certain norm on the scaled difference $n^{1/2}\{H_n(x, \hat{F}_n) - H_n(x, F)\}$. The estimated first-order Edgeworth expansion of $H_n(x, F)$ is also asymptotically minimax and is equivalent to $H_n(x, \hat{F}_n)$ up to terms of order $n^{- 1/2}$. On the other hand, the straightforward normal approximation with estimated variance is usually not asymptotically minimax, because of bias. The results for estimating functionals of $H_n(x, F)$ are similar, with one notable difference: the analysis for functionals with skew-symmetric influence curve, such as the mean of $H_n(x, F)$, involves second-order Edgeworth expansions and rate of convergence $n^{-1}$.

#### Article information

**Source**

Ann. Statist., Volume 10, Number 1 (1982), 212-225.

**Dates**

First available in Project Euclid: 12 April 2007

**Permanent link to this document**

https://projecteuclid.org/euclid.aos/1176345704

**Digital Object Identifier**

doi:10.1214/aos/1176345704

**Mathematical Reviews number (MathSciNet)**

MR642733

**Zentralblatt MATH identifier**

0485.62037

**JSTOR**

links.jstor.org

**Subjects**

Primary: 62G05: Estimation

Secondary: 62E20: Asymptotic distribution theory

**Keywords**

Sampling distribution bootstrap estimates jackknife asymptotic minimax Edgeworth

#### Citation

Beran, Rudolf. Estimated Sampling Distributions: The Bootstrap and Competitors. Ann. Statist. 10 (1982), no. 1, 212--225. doi:10.1214/aos/1176345704. https://projecteuclid.org/euclid.aos/1176345704