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作者：Zhang, Jingfei; Chen, Yuguo
作者单位：University of Illinois System; University of Illinois Urbana-Champaign
摘要：Random graphs with given vertex degrees have been widely used as a model for many real-world complex networks. However, both statistical inference and analytic study of such networks present great challenges. In this article, we propose a new sequential importance sampling method for sampling networks with a given degree sequence. These samples can be used to approximate closely the null distributions of a number of test statistics involved in such networks and provide an accurate estimate of ...
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作者：Xun, Xiaolei; Cao, Jiguo; Mallick, Bani; Maity, Arnab; Carroll, Raymond J.
作者单位：Simon Fraser University; Texas A&M University System; Texas A&M University College Station; North Carolina State University
摘要：Partial differential equation (PDE) models are commonly used to model complex dynamic systems in applied sciences such as biology and finance. The forms of these PDE models are usually proposed by experts based on their prior knowledge and understanding of the dynamic system. Parameters in PDE models often have interesting scientific interpretations, but their values are often unknown and need to be estimated from the measurements of the dynamic system in the presence of measurement errors. Mo...
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作者：Chakraborty, Avishek; Mallick, Bani K.; McClarren, Ryan G.; Kuranz, Carolyn C.; Bingham, Derek; Grosskopf, Michael J.; Rutter, Erica M.; Stripling, Hayes F.; Drake, R. Paul
作者单位：Texas A&M University System; Texas A&M University College Station; Texas A&M University System; Texas A&M University College Station; University of Michigan System; University of Michigan; Simon Fraser University
摘要：Radiation hydrodynamics and radiative shocks are of fundamental interest in the high-energy-density physics research due to their importance in understanding astrophysical phenomena such as supernovae. In the laboratory, experiments can produce shocks with fundamentally similar physics on reduced scales. However, the cost and time constraints of the experiment necessitate use of a computer algorithm to generate a reasonable number of outputs for making valid inference. We focus on modeling emu...
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作者：Chen, Xiaohong
作者单位：Yale University
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作者：Wu, Colin O.; Tian, Xin
作者单位：National Institutes of Health (NIH) - USA; NIH National Heart Lung & Blood Institute (NHLBI)
摘要：An objective of longitudinal analysis is to estimate the conditional distributions of an outcome variable through a regression model. The approaches based on modeling the conditional means are not appropriate for this task when the conditional distributions are skewed or cannot be approximated by a normal distribution through a known transformation. We study a class of time-varying transformation models and a two-step smoothing method for the estimation of the conditional distribution function...
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作者：Bondell, Howard D.; Stefanski, Leonard A.
作者单位：North Carolina State University
摘要：Large- and finite-sample efficiency and resistance to outliers are the key goals of robust statistics. Although often not simultaneously attainable, we, develop and study a linear regression estimator that comes close. Efficiency is obtained from the estimator's close connection to generalized empirical likelihood, and its favorable robustness properties are obtained by constraining the associated sum of (weighted) squared residuals. We prove maximum attainable finite-sample replacement breakd...
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作者：Wu, Yuanshan; Yin, Guosheng
作者单位：Wuhan University; University of Hong Kong
摘要：Censored quantile regression offers a valuable complement to the traditional Cox proportional hazards model for survival analysis. Survival times tend to be right-skewed, particularly when there exists a substantial fraction of long-term survivors who are either cured or immune to the event of interest. For survival data with a cure possibility, we propose cure rate quantile regression under the common censoring scheme that survival times and censoring times are conditionally independent given...
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作者：Dias, Monica Costa; Ichimura, Hidehiko; van den Berg, Gerard J.
作者单位：University of London; London School Economics & Political Science; Universidade do Porto; IZA Institute Labor Economics; University of Tokyo; University of Tokyo; University of Mannheim; Vrije Universiteit Amsterdam
摘要：Matching methods for treatment evaluation based on a conditional independence assumption do not balance selective unobserved differences between treated and nontreated. We derive a simple correction term if there is an instrument that shifts the treatment probability to zero in specific cases. Policies with eligibility restrictions, where treatment is impossible if some variable exceeds a certain value, provide a natural application. In an empirical analysis, we exploit the age eligibility res...
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作者：Lin, Wei; Lv, Jinchi
作者单位：University of Pennsylvania; University of Southern California
摘要：High-dimensional sparse modeling with censored survival data is of great practical importance, as exemplified by modern applications in high-throughput genomic data analysis and credit risk analysis. In this article, we propose a class of regularization methods for simultaneous variable selection and estimation in the additive hazards model, by combining the nonconcave penalized likelihood approach and the pseudoscore method. In a high-dimensional setting where the dimensionality can grow fast...
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作者：Cattaneo, Matias D.; Crump, Richard K.; Jansson, Michael
作者单位：University of Michigan System; University of Michigan; Federal Reserve System - USA; Federal Reserve Bank - New York; University of California System; University of California Berkeley
