Journal of the American Statistical Association

最新文章

• Contextual Dynamic Pricing with Strategic Buyers AI翻译
  作者：Liu, Pangpang; Yang, Zhuoran; Wang, Zhaoran; Sun, Will Wei
  作者单位：Purdue University System; Purdue University; Yale University; Northwestern University
  摘要：Personalized pricing, which involves tailoring prices based on individual characteristics, is commonly used by firms to implement a consumer-specific pricing policy. In this process, buyers can also strategically manipulate their feature data to obtain a lower price, incurring certain manipulation costs. Such strategic behavior can hinder firms from maximizing their profits. In this article, we study the contextual dynamic pricing problem with strategic buyers. The seller does not observe the ...
• Fast Approximation of Shapley Values Through Fractional Factorial Designs AI翻译
  作者：Zhou, Zheng; Mee, Robert; Hamers, Herbert; Zheng, Wei
  作者单位：Beijing University of Technology; University of Tennessee System; University of Tennessee Knoxville; Tilburg University; Tilburg University
  摘要：The Shapley value is a well-known concept in cooperative game theory that provides a fair way to distribute revenues or costs among players. It has found applications in many fields besides economics, such as marketing and biology. Recently, it has been widely applied in data science for data quality evaluation and model interpretation. However, the computation of the Shapley value is an NP-hard problem. For a cooperative game with n players, calculating Shapley values for all players requires...
• Debiasing Watermarks for Large Language Models via Maximal Coupling AI翻译
  作者：Xie, Yangxinyu; Li, Xiang; Mallick, Tanwi; Su, Weijie; Zhang, Ruixun
  作者单位：University of Pennsylvania; University of Pennsylvania; United States Department of Energy (DOE); Argonne National Laboratory; Peking University; Peking University; University of Oxford; University of Oxford
  摘要：Watermarking language models is essential for distinguishing between human and machine-generated text and thus maintaining the integrity and trustworthiness of digital communication. We present a novel green/red list watermarking approach that partitions the token set into green and red lists, subtly increasing the generation probability for green tokens. To correct token distribution bias, our method employs maximal coupling, using a uniform coin flip to decide whether to apply bias correctio...
• Manipulating an Instrumental Variable in an Observational Study of Premature Babies: Design, Bounds, and Inference AI翻译
  作者：Chen, Zhe; Cho, Min Haeng; Zhang, Bo
  作者单位：University of Pennsylvania; University of Washington; University of Washington Seattle; Fred Hutchinson Cancer Center
  摘要：Regionalization of intensive care for premature infants refers to a triage system that directs mothers to hospitals with varying capabilities based on the risks their babies face. Given the limited capacity of highly specialized hospitals, understanding the impact of delivering premature infants at these facilities on infant mortality could facilitate the design of a more efficient perinatal regionalization system. To address this, Baiocchi et al. proposed strengthening a continuous instrument...
• Adaptation Using Spatially Distributed Gaussian Processes AI翻译
  作者：Szabo, Botond; Hadji, Amine; van der Vaart, Aad
  作者单位：Bocconi University; Bocconi University; Leiden University; Leiden University - Excl LUMC; Delft University of Technology
  摘要：We consider the accuracy of an approximate posterior distribution in nonparametric regression problems by combining posterior distributions computed on subsets of the data defined by the locations of the independent variables. We show that this approximate posterior retains the rate of recovery of the full data posterior distribution, where the rate of recovery adapts to the smoothness of the true regression function. As particular examples we consider Gaussian process priors based on integrat...
• Analyzing Whale Calling through Hawkes Process Modeling AI翻译
  作者：Kang, Bokgyeong; Schliep, Erin M.; Gelfand, Alan E.; Yack, Tina M.; Clark, Christopher W.; Schick, Robert S.
  作者单位：Duke University; Dongguk University; North Carolina State University; Duke University; Cornell University
  摘要：Sound is assumed to be the primary modality of communication among marine mammal species. Analyzing acoustic recordings helps to understand the function of the acoustic signals as well as the possible impact of anthropogenic noise on acoustic behavior. Motivated by a dataset from a network of hydrophones in Cape Cod Bay, Massachusetts, using automatically detected calls in recordings, we study the communication process of the endangered North Atlantic right whale. For right whales, an upcall i...
• Simultaneous Inference for Generalized Linear Models with Unmeasured Confounders AI翻译
  作者：Du, Jin-Hong; Wasserman, Larry; Roeder, Kathryn
  作者单位：Carnegie Mellon University; Carnegie Mellon University; Carnegie Mellon University
  摘要：Tens of thousands of simultaneous hypothesis tests are routinely performed in genomic studies to identify differentially expressed genes. However, due to unmeasured confounders, many standard statistical approaches may be substantially biased. This article investigates the large-scale hypothesis testing problem for multivariate generalized linear models in the presence of confounding effects. Under arbitrary confounding mechanisms, we propose a unified statistical estimation and inference fram...
• Prediction of Cognitive Function via Brain Region Volumes with Applications to Alzheimer's Disease Based on Space-Factor-Guided Functional Principal Component Analysis AI翻译
  作者：Wen, Shoudao; Li, Yi; Kong, Dehan; Lin, Huazhen
  作者单位：Southwestern University of Finance & Economics - China; Southwestern University of Finance & Economics - China; University of Michigan System; University of Michigan; University of Toronto
  摘要：Alzheimer's disease (AD) is a prevalent and irreversible brain disorder and early prediction of cognitive function is vital for detecting the onset. The volumes of brain regions can serve as features for predicting cognitive decline, facilitating early detection and intervention. In order to offer a comprehensive representation of brain tissue changes in AD, we employ volume density curves to investigate the relationship between brain regions and cognitive function. However, analyzing these vo...
• Frequency Domain Statistical Inference for High-Dimensional Time Series AI翻译
  作者：Krampe, Jonas; Paparoditis, Efstathios
  作者单位：Cornell University; University of Cyprus
  摘要：Analyzing time series in the frequency domain enables the development of powerful tools for investigating the second-order characteristics of multivariate processes. Parameters like the spectral density matrix and its inverse, the coherence or the partial coherence, encode comprehensively the complex linear relations between the component processes of the multivariate system. In this article, we develop inference procedures for such parameters in a high-dimensional, time series setup. Toward t...
• Discussion of Data Fission: Splitting a Single Data Point AI翻译
  作者：Neufeld, Anna; Dharamshi, Ameer; Gao, Lucy L.; Witten, Daniela; Bien, Jacob
  作者单位：Williams College; University of Washington; University of Washington Seattle; University of British Columbia; University of Washington; University of Washington Seattle; University of Washington; University of Washington Seattle; University of Southern California