On Reverse Shrinkage Effects and Shrinkage Overshoot
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On Reverse Shrinkage Effects and Shrinkage Overshoot. / Jordan, Pascal.
in: PSYCHOMETRIKA, Jahrgang 88, Nr. 1, 03.2023, S. 274-301.Publikationen: SCORING: Beitrag in Fachzeitschrift/Zeitung › SCORING: Zeitschriftenaufsatz › Forschung › Begutachtung
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TY - JOUR
T1 - On Reverse Shrinkage Effects and Shrinkage Overshoot
AU - Jordan, Pascal
N1 - © 2022. The Author(s).
PY - 2023/3
Y1 - 2023/3
N2 - Given a squared Euclidean norm penalty, we examine some less well-known properties of shrinkage estimates. In particular, we highlight that it is possible for some components of the shrinkage estimator to be placed further away from the prior mean than the original estimate. An analysis of this effect is provided within three different modeling settings-encompassing linear, logistic, and ordinal regression models. Additional simulations show that the outlined effect is not a mathematical artefact, but likely to occur in practice. As a byproduct, they also highlight the possibilities of sign reversals ("overshoots") for shrinkage estimates. We point out practical consequences and challenges, which might arise from the observed effects with special emphasis on psychometrics.
AB - Given a squared Euclidean norm penalty, we examine some less well-known properties of shrinkage estimates. In particular, we highlight that it is possible for some components of the shrinkage estimator to be placed further away from the prior mean than the original estimate. An analysis of this effect is provided within three different modeling settings-encompassing linear, logistic, and ordinal regression models. Additional simulations show that the outlined effect is not a mathematical artefact, but likely to occur in practice. As a byproduct, they also highlight the possibilities of sign reversals ("overshoots") for shrinkage estimates. We point out practical consequences and challenges, which might arise from the observed effects with special emphasis on psychometrics.
U2 - 10.1007/s11336-022-09872-8
DO - 10.1007/s11336-022-09872-8
M3 - SCORING: Journal article
C2 - 35665449
VL - 88
SP - 274
EP - 301
JO - PSYCHOMETRIKA
JF - PSYCHOMETRIKA
SN - 0033-3123
IS - 1
ER -