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Pré-Publication, Document De Travail Année : 2009

Bootstrap inference in a linear equation estimated by instrumental variables

Résumé

We study several tests for the coefficient of the single right-hand-side endogenous variable in a linear equation estimated by instrumental variables. We show that writing all the test statistics—Student's t, Anderson-Rubin, the LM statistic of Kleibergen and Moreira (K), and likelihood ratio (LR)—as functions of six random quantities leads to a number of interesting results about the properties of the tests under weakinstrument asymptotics. We then propose several new procedures for bootstrapping the three non-exact test statistics and also a new conditional bootstrap version of the LR test. These use more efficient estimates of the parameters of the reduced-form equation than existing procedures. When the best of these new procedures is used, both the K and conditional bootstrap LR tests have excellent performance under the null. However, power considerations suggest that the latter is probably the method of choice.
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Dates et versions

halshs-00442713 , version 1 (22-12-2009)

Identifiants

  • HAL Id : halshs-00442713 , version 1

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Russell Davidson, James Mackinnon. Bootstrap inference in a linear equation estimated by instrumental variables. 2009. ⟨halshs-00442713⟩
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