Academic Journal
Reducing bias and mitigating the influence of excess of zeros in regression covariates with multi-outcome adaptive LAD-lasso
| العنوان: | Reducing bias and mitigating the influence of excess of zeros in regression covariates with multi-outcome adaptive LAD-lasso |
|---|---|
| المؤلفون: | Möttönen, Jyrki, Lähderanta, Tero, Salonen, Janne, Sillanpaa, Mikko J. |
| المساهمون: | Department of Mathematics and Statistics |
| بيانات النشر: | TAYLOR & FRANCIS INC |
| سنة النشر: | 2024 |
| المجموعة: | Helsingfors Universitet: HELDA – Helsingin yliopiston digitaalinen arkisto |
| مصطلحات موضوعية: | Multivariate analysis, P >> n regression, Penalized regression, Robust procedures, Variable selection, Zero-inflated continuous data, Mathematics |
| الوصف: | Zero-inflated explanatory variables, as opposed to outcome variables, are common, for example, in environmental sciences. In this article, we address the problem of having excess of zero values in some continuous explanatory variables, which are subject to multi-outcome lasso-regularized variable selection. In short, the problem results from the failure of the lasso-type of shrinkage methods to recognize any difference between zero value occurring either in the regression coefficient or in the corresponding value of the explanatory variable. This kind of confounding will obviously increase the number of false positives - all non-zero regression coefficients do not necessarily represent true outcome effects. We present here the adaptive LAD-lasso for multiple outcomes, which extends the earlier work of multi-outcome LAD-lasso with adaptive penalization. In addition to well-known property of having less biased regression coefficients, we show that the adaptivity also improves method's ability to recover from influences of excess of zero values measured in continuous covariates. ; Peer reviewed |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | application/pdf |
| اللغة: | English |
| Relation: | Möttönen , J , Lähderanta , T , Salonen , J & Sillanpaa , M J 2023 , ' Reducing bias and mitigating the influence of excess of zeros in regression covariates with multi-outcome adaptive LAD-lasso ' , Communications in Statistics: Theory and Methods . https://doi.org/10.1080/03610926.2023.2189059; http://hdl.handle.net/10138/569503; 86dbacd8-425c-4897-91fc-f4814e372e4f; 000958211600001 |
| الاتاحة: | http://hdl.handle.net/10138/569503 |
| Rights: | cc_by ; info:eu-repo/semantics/openAccess ; openAccess |
| رقم الانضمام: | edsbas.57AF1565 |
| قاعدة البيانات: | BASE |
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