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Computing the observed Fisher information matrix for linear Gaussian state space models and its application to specification tests

Masaru Chiba (26343706) · figshare
Figshare · Datasets · License: CC BY 4.0
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biotechnologyhematologyinorganic-chemistrymedicineneurosciencespace-science
This article develops a recursive formula for computing the exact score vector and the observed Fisher information matrix in linear Gaussian state space models. The method provides closed-form analytical expressions for both first- and second-order derivatives, avoiding reliance on numerical diff
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