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作者:Chen, Yunxiao; Xu, Gongjun
作者单位:University of London; London School Economics & Political Science; University of Michigan System; University of Michigan; University of London; London School Economics & Political Science
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作者:He, Xuming; Tan, Kean Ming; Zhou, Wen-Xin
作者单位:Washington University (WUSTL); University of Michigan System; University of Michigan; University of Illinois System; University of Illinois Chicago; University of Illinois Chicago Hospital
摘要:Expected shortfall (ES), also known as superquantile or conditional value-at-risk, is an important measure in risk analysis and stochastic optimisation and has applications beyond these fields. In finance, it refers to the conditional expected return of an asset given that the return is below some quantile of its distribution. In this paper, we consider a joint regression framework recently proposed to model the quantile and ES of a response variable simultaneously, given a set of covariates. ...
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作者:Cai, Junhui; Yang, Dan; Zhao, Linda; Zhu, Wu
作者单位:University of Pennsylvania; University of Hong Kong; Tsinghua University; University of Notre Dame
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作者:Van Werde, Alexander
作者单位:Eindhoven University of Technology; Eindhoven University of Technology
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作者:Wang, Kaizheng
作者单位:Columbia University; Columbia University
摘要:In the 1930s, Psychologists began developing Multiple-Factor Analysis to decompose multivariate data into a small number of interpretable factors without any a priori knowledge about those factors. In this form of factor analysis, the Varimax factor rotation redraws the axes through the multi-dimensional factors to make them sparse and thus make them more interpretable. Charles Spearman and many others objected to factor rotations because the factors seem to be rotationally invariant. Despite ...
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作者:Whitehouse, Michael; Whiteley, Nick; Rimella, Lorenzo
作者单位:University of Bristol; Lancaster University
摘要:Addressing the challenge of scaling-up epidemiological inference to complex and heterogeneous models, we introduce Poisson approximate likelihood (PAL) methods. In contrast to the popular ordinary differential equation (ODE) approach to compartmental modelling, in which a large population limit is used to motivate a deterministic model, PALs are derived from approximate filtering equations for finite-population, stochastic compartmental models, and the large population limit drives consistency...
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作者:Han, Rungang; Zhang, Anru R.
作者单位:Duke University
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作者:Pargent, Florian; Goretzko, David; von Oertzen, Timo
作者单位:University of Munich; Utrecht University; Max Planck Society; Bundeswehr University Munich; University of Munich
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作者:Pensky, Marianna
作者单位:State University System of Florida; University of Central Florida
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作者:Xue, Liugen
作者单位:Henan University
摘要:The estimation and empirical likelihood (EL) of the parameters of interest in a partially linear single-index varying-coefficient model are studied. A two-stage method is presented to estimate the regression parameters and the coefficient functions. The asymptotic distributions of the proposed estimators are obtained. Meanwhile, a bias-corrected EL ratio for the regression parameters is proposed. It is shown that the ratio is asymptotically standard chi-squared. The result can be directly used...