| edoc-Server der Humboldt-Universität zu Berlin |
| Autor(en): | Denis Belomestny; Vladimir G. Spokoiny | Titel: | Spatial aggregation of local likelihood estimates with applications to classification |
| Erscheinungsdatum: | 28.04.2006 |
| Erschienen in: |
Sonderforschungsbereich 649: Ökonomisches Risiko 36 (SFB 649 Papers) ISSN: 1860-5664 |
| Volltext: | pdf (urn:nbn:de:kobv:11-10063429) |
| Fachgebiet(e): | Wirtschaft |
| Schlagwörter (eng): | adaptive weights, local likelihood, exponential family, classification |
| Herausgeber: | Humboldt-Universität zu Berlin, Wirtschaftswissenschaftliche Fakultät |
| Metadatenexport:
|
Endnote Bibtex |
| print on demand:
|
|
| Diese Seite taggen:
|
| Abstract (eng): | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| This paper presents a new method for spatially adaptive local likelihood estimation which applies to a broad class of nonparametric models, including the Gaussian, Poisson and binary response models. The main idea of themethod is given a sequence of local likelihood estimates (``weak´´ estimates),to construct a new aggregated estimate whose pointwise risk is of order of thesmallest risk among all ``weak´´ estimates. We also propose a new approach towards selecting the parameters of the procedure by providing the prescribed behavior of the resulting estimate in the simple parametric situation. We establish a number of important theoretical results concerning the optimality of the aggregated estimate. In particular, our ``oracle´´ results claims that its risk is up to some logarithmic multiplier equal to the smallest risk for the given family of estimates. The performance of the procedure is illustrated by application to the classification problem. A numerical study demonstrates its nice performance in simulated and real life examples. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Zugriffsstatistik:
Bei Formatversionen eines Dokuments, die aus mehreren Dateien bestehen (insbesondere HTML), wird jeweils der monatlich höchste Zugriffswert auf eine der Dateien (Kapitel) des Dokuments angezeigt. Um die detaillierten Zugriffszahlen zu sehen, fahren Sie bitte mit dem Mauszeiger über die einzelnen Balken des Diagramms. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Gesamtzahl der Zugriffe seit May 2011:
|