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Bayesian Selection Model With Shrinking Priors for Nonignorable Missingness- [electronic resource]
Bayesian Selection Model With Shrinking Priors for Nonignorable Missingness - [electronic ...
Bayesian Selection Model With Shrinking Priors for Nonignorable Missingness- [electronic resource]

Detailed Information

자료유형  
 학위논문파일 국외
최종처리일시  
20240214101913
ISBN  
9798380360999
DDC  
150
저자명  
Vera, Juan Diego.
서명/저자  
Bayesian Selection Model With Shrinking Priors for Nonignorable Missingness - [electronic resource]
발행사항  
[S.l.]: : University of California, Los Angeles., 2023
발행사항  
Ann Arbor : : ProQuest Dissertations & Theses,, 2023
형태사항  
1 online resource(208 p.)
주기사항  
Source: Dissertations Abstracts International, Volume: 85-03, Section: B.
주기사항  
Advisor: Enders, Craig K.
학위논문주기  
Thesis (Ph.D.)--University of California, Los Angeles, 2023.
사용제한주기  
This item must not be sold to any third party vendors.
초록/해제  
요약This study investigates the effectiveness of Bayesian variable selection (BVS) procedures in dealing with missing not at random (MNAR) data for identification in selection models. Three BVS-adapted selection models, namely Bayesian LASSO, horseshoe prior, and spike-and-slab prior, were compared, along with established missing data methods such as a model that assumes a missing at random (MAR) process and full-selection model. The results indicate that the spike-and-slab prior consistently outperformed other BVS methods in terms of accuracy and bias for various parameters, including slope estimates, residual variance, and intercept. When compared with the full-selection model, the spike-and-slab model exhibited superior performance across all parameters based on mean squared error (MSE) results.Although the MAR and spike-and-slab models showed comparable performance for slope estimates, the spike-and-slab model consistently outperformed the MAR model in estimating residual variance and intercept. This comparable performance is attributed to the bias-variance tradeoff. The MAR model, while biased, demonstrated efficiency by estimating fewer parameters than selection models and obtaining robust support from the observed data. On the other hand, the spike-and-slab model outperformed the full-selection model, even when the full-selection model aligned with the true data-generating model. The adaptation of BVS to selection models, particularly through the spike-and-slab method, yielded promising results with unbiased estimates under various conditions. However, it is important to acknowledge that this study represents an initial exploration of this subject, and its scope was inherently limited. Finally, the BVS adaptations to the selection model was illustrated with data from a clinical-trial study.
일반주제명  
Psychology.
일반주제명  
Statistics.
일반주제명  
Mathematics.
키워드  
Bayesian variable selection
키워드  
Horseshoe
키워드  
Mean squared error
키워드  
Slope estimates
기타저자  
University of California, Los Angeles Psychology 0780
기본자료저록  
Dissertations Abstracts International. 85-03B.
기본자료저록  
Dissertation Abstract International
전자적 위치 및 접속  
로그인 후 원문을 볼 수 있습니다.

MARC

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■00520240214101913
■006m          o    d                
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■020    ▼a9798380360999
■035    ▼a(MiAaPQ)AAI30687279
■040    ▼aMiAaPQ▼cMiAaPQ
■0820  ▼a150
■1001  ▼aVera,  Juan  Diego.
■24510▼aBayesian  Selection  Model  With  Shrinking  Priors  for  Nonignorable  Missingness▼h[electronic  resource]
■260    ▼a[S.l.]:▼bUniversity  of  California,  Los  Angeles.  ▼c2023
■260  1▼aAnn  Arbor  :▼bProQuest  Dissertations  &  Theses,  ▼c2023
■300    ▼a1  online  resource(208  p.)
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  85-03,  Section:  B.
■500    ▼aAdvisor:  Enders,  Craig  K.
■5021  ▼aThesis  (Ph.D.)--University  of  California,  Los  Angeles,  2023.
■506    ▼aThis  item  must  not  be  sold  to  any  third  party  vendors.
■520    ▼aThis  study  investigates  the  effectiveness  of  Bayesian  variable  selection  (BVS)  procedures  in  dealing  with  missing  not  at  random  (MNAR)  data  for  identification  in  selection  models.  Three  BVS-adapted  selection  models,  namely  Bayesian  LASSO,  horseshoe  prior,  and  spike-and-slab  prior,  were  compared,  along  with  established  missing  data  methods  such  as  a  model  that  assumes  a  missing  at  random  (MAR)  process  and  full-selection  model.  The  results  indicate  that  the  spike-and-slab  prior  consistently  outperformed  other  BVS  methods  in  terms  of  accuracy  and  bias  for  various  parameters,  including  slope  estimates,  residual  variance,  and  intercept.  When  compared  with  the  full-selection  model,  the  spike-and-slab  model  exhibited  superior  performance  across  all  parameters  based  on  mean  squared  error  (MSE)  results.Although  the  MAR  and  spike-and-slab  models  showed  comparable  performance  for  slope  estimates,  the  spike-and-slab  model  consistently  outperformed  the  MAR  model  in  estimating  residual  variance  and  intercept.  This  comparable  performance  is  attributed  to  the  bias-variance  tradeoff.  The  MAR  model,  while  biased,  demonstrated  efficiency  by  estimating  fewer  parameters than  selection  models  and  obtaining  robust  support  from  the  observed  data.  On  the  other  hand,  the  spike-and-slab  model  outperformed  the  full-selection  model,  even  when  the  full-selection  model  aligned  with  the  true  data-generating  model.  The  adaptation  of  BVS  to  selection  models,  particularly  through  the  spike-and-slab  method,  yielded  promising  results  with  unbiased  estimates  under  various  conditions.  However,  it  is  important  to  acknowledge  that  this  study  represents  an  initial  exploration  of  this  subject,  and  its  scope  was  inherently  limited.  Finally,  the  BVS  adaptations  to  the  selection  model  was  illustrated  with  data  from  a  clinical-trial  study.
■590    ▼aSchool  code:  0031.
■650  4▼aPsychology.
■650  4▼aStatistics.
■650  4▼aMathematics.
■653    ▼aBayesian  variable  selection
■653    ▼aHorseshoe
■653    ▼aMean  squared  error
■653    ▼aSlope  estimates
■690    ▼a0621
■690    ▼a0405
■690    ▼a0463
■71020▼aUniversity  of  California,  Los  Angeles▼bPsychology  0780.
■7730  ▼tDissertations  Abstracts  International▼g85-03B.
■773    ▼tDissertation  Abstract  International
■790    ▼a0031
■791    ▼aPh.D.
■792    ▼a2023
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T16935279▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.
■980    ▼a202402▼f2024

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