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2012 | OriginalPaper | Buchkapitel

1. How Accurate Can Instrumental Variable Models Become?

verfasst von : Torsten Söderström

Erschienen in: System Identification, Environmental Modelling, and Control System Design

Verlag: Springer London

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Abstract

This chapter presents and discusses various aspects of what theory predicts in terms of accuracy of instrumental variable estimates. A general derivation of the covariance matrix of the parameter estimates is presented. This matrix is influenced by a number of user choices in the identification method, and it is further discussed how these user choices can be made in order to make the covariance matrix as small as possible in a well-defined sense. The chapter includes also a comparison with the prediction error method, and a discussion of in what situations an optimal instrumental variable method can be statistically efficient.

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Metadaten
Titel
How Accurate Can Instrumental Variable Models Become?
verfasst von
Torsten Söderström
Copyright-Jahr
2012
Verlag
Springer London
DOI
https://doi.org/10.1007/978-0-85729-974-1_1

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