Properties of Batched Quadratic-Form Variance Parameter Estimators for Simulations

  • Authors:
  • Christos Alexopoulos;David Goldsman;Gamze Tokol

  • Affiliations:
  • -;-;-

  • Venue:
  • INFORMS Journal on Computing
  • Year:
  • 2001

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Abstract

We examine the practice of batching of certain quadratic-form estimators for the variance parameter of a stochastic process. The class of batched quadratic-form estimators includes, among others, the standardized time series (STS) weighted area and weighted Cram脙©r-von Mises estimators. We give results on the expected value and variance of such estimators as the batch size and/or the number of batches increase. In particular, we show that the above STS estimators are consistent for the variance parameter in terms of mean squared error. An analytical example involving a first-order autoregressive process illustrates our findings.