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- Häggström, Jenny,1980-Umeå universitet,Statistiska institutionen (author)
Selection of smoothing parameters with application in causal inference
- BookEnglish2011
Publisher, publication year, extent ...
- Umeå :Statistiska institutionen, Umeå universitet,2011
- 27 s.
- electronicrdacarrier
Numbers
- LIBRIS-ID:oai:DiVA.org:umu-39614
- ISBN:9789174591477
- https://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-39614URI
Supplementary language notes
- Language:English
- Summary in:English
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- SwePubSwePub
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Series
- Statistical studies,1100-8989 ;44
Notes
- This thesis is a contribution to the research area concerned with selection of smoothing parameters in the framework of nonparametric and semiparametric regression. Selection of smoothing parameters is one of the most important issues in this framework and the choice can heavily influence subsequent results. A nonparametric or semiparametric approach is often desirable when large datasets are available since this allow us to make fewer and weaker assumptions as opposed to what is needed in a parametric approach. In the first paper we consider smoothing parameter selection in nonparametric regression when the purpose is to accurately predict future or unobserved data. We study the use of accumulated prediction errors and make comparisons to leave-one-out cross-validation which is widely used by practitioners. In the second paper a general semiparametric additive model is considered and the focus is on selection of smoothing parameters when optimal estimation of some specific parameter is of interest. We introduce a double smoothing estimator of a mean squared error and propose to select smoothing parameters by minimizing this estimator. Our approach is compared with existing methods.The third paper is concerned with the selection of smoothing parameters optimal for estimating average treatment effects defined within the potential outcome framework. For this estimation problem we propose double smoothing methods similar to the method proposed in the second paper. Theoretical properties of the proposed methods are derived and comparisons with existing methods are made by simulations.In the last paper we apply our results from the third paper by using a double smoothing method for selecting smoothing parameters when estimating average treatment effects on the treated. We estimate the effect on BMI of divorcing in middle age. Rich data on socioeconomic conditions, health and lifestyle from Swedish longitudinal registers is used.
Subject headings and genre
- NATURVETENSKAP Matematik Sannolikhetsteori och statistik hsv//swe
- NATURAL SCIENCES Mathematics Probability Theory and Statistics hsv//eng
- Smoothing parameter selection
- Nonparametric regression
- Semiparametric additive model
- Double smoothing
- Causal inference
- BMI
- Divorce
- Statistics
- Statistik
- Statistics
- statistik
Added entries (persons, corporate bodies, meetings, titles ...)
- de Luna, Xavier,ProfessorUmeå universitet,Statistiska institutionen(Swepub:umu)xade0001 (thesis advisor)
- Wiberg, Marie,PhDUmeå universitet,Statistiska institutionen(Swepub:umu)maewig95 (thesis advisor)
- Ma, Yanyuan,Associate ProfessorTexas A&M University, Department of Statistics (opponent)
- Umeå universitetStatistiska institutionen (creator_code:org_t)
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