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Regularized Regression When Boundary Values Are Possible
Regularized Regression When Boundary Values Are Possible
Regularized Regression When Boundary Values Are Possible

상세정보

자료유형  
 학위논문 서양
최종처리일시  
20260202103129
ISBN  
9798315705543
DDC  
310
저자명  
Li, Tianqi.
서명/저자  
Regularized Regression When Boundary Values Are Possible
발행사항  
[Sl] : The University of North Carolina at Chapel Hill, 2025
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2025
형태사항  
196 p
주기사항  
Source: Dissertations Abstracts International, Volume: 86-11, Section: B.
주기사항  
Advisor: Hill, Jonathan B.;Verdier, Valentin.
학위논문주기  
Thesis (Ph.D.)--The University of North Carolina at Chapel Hill, 2025.
초록/해제  
요약Regularized estimators have demonstrated outstanding performance across a wide range of applications. In this dissertation, I study regularized estimators when the true value of parameters possibly lies on the boundary of some parameter space. Due to the boundary, the asymptotic distribution of an estimator may no longer be normal. Moreover, regularization can introduce bias to the estimator, which can also interact with the boundary and make the distribution unclear. To understand these issues, in the first part of this dissertation, I derive the asymptotic distributions of the ridge regressor, the least absolute shrinkage and selection operator, and general regularized M-estimators under constraints and fixed-dimensional settings. Since regularization is often applied in high-dimensional contexts, in the second part, I propose a constraint debiased machine learning estimator and a quasi-likelihood ratio test for high-dimensional linear models. In the third part, I focus on the high-dimensional random-coefficient multinomial logit model, commonly used to study discrete choices in economics. I develop a regularized maximum likelihood estimator for simultaneous variable selection, and construct a constrained debiased machine learning estimator to account for both regularization bias and boundary. Finally, I illustrate the impacts of high-dimensional parameters and boundary in an empirical application to soft-drink markets in North Carolina.
일반주제명  
Statistics
키워드  
Boundary
키워드  
Debiased machine learning
키워드  
Inference
키워드  
Lasso
키워드  
Mixed logit
키워드  
Regularization
기타저자  
The University of North Carolina at Chapel Hill Economics
기본자료저록  
Dissertations Abstracts International. 86-11B.
전자적 위치 및 접속  
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■1001  ▼aLi,  Tianqi.
■24510▼aRegularized  Regression  When  Boundary  Values  Are  Possible
■260    ▼a[Sl]▼bThe  University  of  North  Carolina  at  Chapel  Hill▼c2025
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2025
■300    ▼a196  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  86-11,  Section:  B.
■500    ▼aAdvisor:  Hill,  Jonathan  B.;Verdier,  Valentin.
■5021  ▼aThesis  (Ph.D.)--The  University  of  North  Carolina  at  Chapel  Hill,  2025.
■520    ▼aRegularized  estimators  have  demonstrated  outstanding  performance  across  a  wide  range  of  applications.  In  this  dissertation,  I  study  regularized  estimators  when  the  true  value  of  parameters  possibly  lies  on  the  boundary  of  some  parameter  space.  Due  to  the  boundary,  the  asymptotic  distribution  of  an  estimator  may  no  longer  be  normal.  Moreover,  regularization  can  introduce  bias  to  the  estimator,  which  can  also  interact  with  the  boundary  and  make  the  distribution  unclear.  To  understand  these  issues,  in  the  first  part  of  this  dissertation,  I  derive  the  asymptotic  distributions  of  the  ridge  regressor,  the  least  absolute  shrinkage  and  selection  operator,  and  general  regularized  M-estimators  under  constraints  and  fixed-dimensional  settings.  Since  regularization  is  often  applied  in  high-dimensional  contexts,  in  the  second  part,  I  propose  a  constraint  debiased  machine  learning  estimator  and  a  quasi-likelihood  ratio  test  for  high-dimensional  linear  models.  In  the  third  part,  I  focus  on  the  high-dimensional  random-coefficient  multinomial  logit  model,  commonly  used  to  study  discrete  choices  in  economics.  I  develop  a  regularized  maximum  likelihood  estimator  for  simultaneous  variable  selection,  and  construct  a  constrained  debiased  machine  learning  estimator  to  account  for  both  regularization  bias  and  boundary.  Finally,  I  illustrate  the  impacts  of  high-dimensional  parameters  and  boundary  in  an  empirical  application  to  soft-drink  markets  in  North  Carolina.
■590    ▼aSchool  code:  0153.
■650  4▼aStatistics
■653    ▼aBoundary
■653    ▼aDebiased  machine  learning
■653    ▼aInference
■653    ▼aLasso
■653    ▼aMixed  logit
■653    ▼aRegularization
■690    ▼a0501
■690    ▼a0800
■690    ▼a0463
■71020▼aThe  University  of  North  Carolina  at  Chapel  Hill▼bEconomics.
■7730  ▼tDissertations  Abstracts  International▼g86-11B.
■790    ▼a0153
■791    ▼aPh.D.
■792    ▼a2025
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17357086▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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