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Essays in Econometrics: Group Heterogeneity and Misspecification
Essays in Econometrics: Group Heterogeneity and Misspecification
Essays in Econometrics: Group Heterogeneity and Misspecification

상세정보

자료유형  
 학위논문 서양
최종처리일시  
20260202103013
ISBN  
9798280756205
DDC  
310
저자명  
Gonzalez Casasus, Oriol.
서명/저자  
Essays in Econometrics: Group Heterogeneity and Misspecification
발행사항  
[Sl] : University of Pennsylvania, 2025
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2025
형태사항  
235 p
주기사항  
Source: Dissertations Abstracts International, Volume: 86-12, Section: B.
주기사항  
Advisor: Cheng, Xu;Schorfheide, Frank.
학위논문주기  
Thesis (Ph.D.)--University of Pennsylvania, 2025.
초록/해제  
요약Heterogeneity is pervasive in social sciences and manifests in many forms across economic agents and over time. Examples include preferences for products, effects of governmental policies, capital and labor decisions by firms, investment strategies by financial agents, and a large etcetera. Economic and statistical models are by construction a stylized version of reality and group heterogeneity, if not properly accounted for, can lead to model misspecification. An important question is then whether such misspecification transmits to the economic predictions derived from those models, and what are the implications thereof. A related question is how much heterogeneity can be provably captured.This dissertation studies these two related problems-heterogeneity and misspecification-from an econometric perspective in three independent chapters. Chapter 1 treats both problems together by studying a model which allows for time-varying group-specific unobserved heterogeneity, but is misspecified such that the latent group structure cannot be accurately recovered. I show how auxiliary data can help mitigate misspecification and consistently recover time-varying group heterogeneity in an optimal way. To that end, I propose the Covariate-Assisted Shrinkage estimator, derive several analytical properties, and study its performance through simulation experiments and one empirical application.Chapters 2 and 3 zoom in on each of the aforementioned problems individually. Chapter 2 studies how much heterogeneity can be allowed while still able to guarantee valid statistical inference. The framework assumes that statistical dependence stems from links in an underlying network. The strength of dependence is left unrestricted, and conditions are given based on the network topology. Chapter 3 investigates how we should adapt our decisions in the (potential) presence of model misspecification. The starting point is a dynamically misspecified model that is used for forecasting and impulse response estimation. The results show that the consequences of model misspecification are meaningful, and using misspecification-robust methods like the proposed PC and IRFC selection criteria proves crucial.
일반주제명  
Statistics
키워드  
Econometrics
키워드  
Heterogeneity
키워드  
Misspecification
키워드  
Investment strategies
기타저자  
University of Pennsylvania Economics
기본자료저록  
Dissertations Abstracts International. 86-12B.
전자적 위치 및 접속  
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■1001  ▼aGonzalez  Casasus,  Oriol.
■24510▼aEssays  in  Econometrics:  Group  Heterogeneity  and  Misspecification
■260    ▼a[Sl]▼bUniversity  of  Pennsylvania▼c2025
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2025
■300    ▼a235  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  86-12,  Section:  B.
■500    ▼aAdvisor:  Cheng,  Xu;Schorfheide,  Frank.
■5021  ▼aThesis  (Ph.D.)--University  of  Pennsylvania,  2025.
■520    ▼aHeterogeneity  is  pervasive  in  social  sciences  and  manifests  in  many  forms  across  economic  agents  and  over  time.  Examples  include  preferences  for  products,  effects  of  governmental  policies,  capital  and  labor  decisions  by  firms,  investment  strategies  by  financial  agents,  and  a  large  etcetera.  Economic  and  statistical  models  are  by  construction  a  stylized  version  of  reality  and  group  heterogeneity,  if  not  properly  accounted  for,  can  lead  to  model  misspecification.  An  important  question  is  then  whether  such  misspecification  transmits  to  the  economic  predictions  derived  from  those  models,  and  what  are  the  implications  thereof.  A  related  question  is  how  much  heterogeneity  can  be  provably  captured.This  dissertation  studies  these  two  related  problems-heterogeneity  and  misspecification-from  an  econometric  perspective  in  three  independent  chapters.  Chapter  1  treats  both  problems  together  by  studying  a  model  which  allows  for  time-varying  group-specific  unobserved  heterogeneity,  but  is  misspecified  such  that  the  latent  group  structure  cannot  be  accurately  recovered.  I  show  how  auxiliary  data  can  help  mitigate  misspecification  and  consistently  recover  time-varying  group  heterogeneity  in  an  optimal  way.  To  that  end,  I  propose  the  Covariate-Assisted  Shrinkage  estimator,  derive  several  analytical  properties,  and  study  its  performance  through  simulation  experiments  and  one  empirical  application.Chapters  2  and  3  zoom  in  on  each  of  the  aforementioned  problems  individually.  Chapter  2  studies  how  much  heterogeneity  can  be  allowed  while  still  able  to  guarantee  valid  statistical  inference.  The  framework  assumes  that  statistical  dependence  stems  from  links  in  an  underlying  network.  The  strength  of  dependence  is  left  unrestricted,  and  conditions  are  given  based  on  the  network  topology.  Chapter  3  investigates  how  we  should  adapt  our  decisions  in  the  (potential)  presence  of  model  misspecification.  The  starting  point  is  a  dynamically  misspecified  model  that  is  used  for  forecasting  and  impulse  response  estimation.  The  results  show  that  the  consequences  of  model  misspecification  are  meaningful,  and  using  misspecification-robust  methods  like  the  proposed  PC  and  IRFC  selection  criteria  proves  crucial.
■590    ▼aSchool  code:  0175.
■650  4▼aStatistics
■653    ▼aEconometrics
■653    ▼aHeterogeneity
■653    ▼aMisspecification
■653    ▼aInvestment  strategies
■690    ▼a0501
■690    ▼a0511
■690    ▼a0601
■690    ▼a0463
■71020▼aUniversity  of  Pennsylvania▼bEconomics.
■7730  ▼tDissertations  Abstracts  International▼g86-12B.
■790    ▼a0175
■791    ▼aPh.D.
■792    ▼a2025
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17356666▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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