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Decision theory
minimax optimality
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minimax optimality The objective of the present paper is to develop a minimax theory for the varying coefficient model in a non-asymptotic setting. We consider a high-dimensional sparse varying coefficient model where only few of the covariates are present and only some of those covariates are time dependent. Our analysis allows the time dependent covariates to have different degrees of smoothness and to be spatially inhomogeneous. We develop the minimax lower bounds for the quadratic risk and construct an adaptive estimator which attains those lower bounds within a constant (if all time-dependent covariates are spatially homogeneous) or logarithmic factor of the number of observations
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TEST: An Official Journal of the Spanish Society of Statistics and Operations Research
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Decision theory classification of high-dimensional vectors based on small samples
Bradshaw, David
;
Pensky, Marianna
- In:
TEST: An Official Journal of the Spanish Society of …
17
(
2008
)
1
,
pp. 83-100
Persistent link: https://www.econbiz.de/10005613309
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