Computational Statistics

, Volume 17, Issue 4, pp 453–464 | Cite as

Are Efficient Estimators in Single-Index Models Really Efficient? A Computational Discussion

  • Marian Hristache


In this paper, we consider estimators of the finite dimensional parameter θ0 in the single-index regression model defined by: E(YX) = E(Y0). We use semiparametric weighted M-estimators defined as maximizing a pseudo-likelihood based on the linear exponential family and which have been shown to be asymptotically efficient. We discuss the choice of the pseudo-likelihood and the practical efficiency of these estimators, using computational arguments. We show that for a large but reasonable sample size, the asymptotically efficient estimator works better than the usual ones.


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Copyright information

© Physica-Verlag 2002

Authors and Affiliations

  • Marian Hristache
    • 1
  1. 1.ENSAI and CRESTBRUZFrance

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