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Power priors for replication studies 复制研究的功率先验
Pub Date : 2023-09-21 DOI: 10.1007/s11749-023-00888-5
Samuel Pawel, Frederik Aust, Leonhard Held, Eric-Jan Wagenmakers
Abstract The ongoing replication crisis in science has increased interest in the methodology of replication studies. We propose a novel Bayesian analysis approach using power priors: The likelihood of the original study’s data is raised to the power of $$alpha $$ α , and then used as the prior distribution in the analysis of the replication data. Posterior distribution and Bayes factor hypothesis tests related to the power parameter $$alpha $$ α quantify the degree of compatibility between the original and replication study. Inferences for other parameters, such as effect sizes, dynamically borrow information from the original study. The degree of borrowing depends on the conflict between the two studies. The practical value of the approach is illustrated on data from three replication studies, and the connection to hierarchical modeling approaches explored. We generalize the known connection between normal power priors and normal hierarchical models for fixed parameters and show that normal power prior inferences with a beta prior on the power parameter $$alpha $$ α align with normal hierarchical model inferences using a generalized beta prior on the relative heterogeneity variance $$I^2$$ I 2 . The connection illustrates that power prior modeling is unnatural from the perspective of hierarchical modeling since it corresponds to specifying priors on a relative rather than an absolute heterogeneity scale.
科学中持续的重复性危机增加了人们对重复性研究方法的兴趣。我们提出了一种新的贝叶斯分析方法,使用幂先验:将原始研究数据的似然提高到$$alpha $$ α的幂,然后用作复制数据分析中的先验分布。与功率参数$$alpha $$ α相关的后验分布和贝叶斯因子假设检验量化了原始研究和复制研究之间的相容程度。对其他参数的推断,如效应大小,动态地从原始研究中借用信息。借鉴的程度取决于两种研究之间的冲突。该方法的实用价值是通过三个复制研究的数据来说明的,并探讨了与分层建模方法的联系。我们对固定参数的正常功率先验和正常层次模型之间的已知联系进行了推广,并表明在功率参数$$alpha $$ α上具有beta先验的正常功率先验推断与在相对异质性方差$$I^2$$ I 2上使用广义beta先验的正常层次模型推断一致。这种联系说明,从分层建模的角度来看,权力先验建模是不自然的,因为它对应于在相对而不是绝对异质性尺度上指定先验。
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引用次数: 2
Gender wage difference estimation at quantile levels using sample survey data 使用抽样调查数据在分位数水平上估计性别工资差异
Pub Date : 2023-09-19 DOI: 10.1007/s11749-023-00885-8
Mihaela-Cătălina Anastasiade-Guinand, Alina Matei, Yves Tillé
Abstract This paper is motivated by the growing interest in estimating gender wage differences in official statistics. The wage of an employee is hypothetically a reflection of her or his characteristics, such as education level or work experience. It is possible that men and women with the same characteristics earn different wages. Our goal is to estimate the differences between wages at different quantiles, using sample survey data within a superpopulation framework. To do this, we use a parametric approach based on conditional distributions of the wages in function of some auxiliary information, as well as a counterfactual distribution. We show in our simulation studies that the use of auxiliary information well correlated with the wages reduces the variance of the counterfactual quantile estimates compared to those of the competitors. Since, in general, wage distributions are heavy-tailed, the interest is to model wages by using heavy-tailed distributions like the GB2 distribution. We illustrate the approach using this distribution and the wages for men and women using simulated and real data from the Swiss Federal Statistical Office.
在官方统计中,越来越多的人对估计性别工资差异感兴趣,这是本文的动机。假设一个员工的工资反映了她或他的特点,如教育水平或工作经验。具有相同特征的男性和女性有可能获得不同的工资。我们的目标是使用超人口框架内的抽样调查数据来估计不同分位数的工资差异。为了做到这一点,我们使用了一种参数方法,该方法基于工资的条件分布,以及一些辅助信息的函数,以及反事实分布。我们在模拟研究中表明,与竞争对手相比,使用与工资密切相关的辅助信息减少了反事实分位数估计的方差。由于一般来说,工资分布是重尾分布,所以我们的兴趣是通过使用GB2分布这样的重尾分布来模拟工资。我们使用这种分布来说明这种方法,并使用瑞士联邦统计局的模拟和真实数据来说明男女工资。
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引用次数: 0
On the Randić index and its variants of network data 论网络数据的randiic指数及其变体
Pub Date : 2023-09-15 DOI: 10.1007/s11749-023-00887-6
Mingao Yuan
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引用次数: 4
Selective inference for false discovery proportion in a hidden Markov model 隐马尔可夫模型中错误发现比例的选择性推断
Pub Date : 2023-09-14 DOI: 10.1007/s11749-023-00886-7
Marie Perrot-Dockès, Gilles Blanchard, Pierre Neuvial, Etienne Roquain
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引用次数: 0
Variable selection in function-on-scalar single-index model via the alternating direction method of multipliers 基于乘子交替方向法的标量函数单指标模型变量选择
Pub Date : 2023-09-13 DOI: 10.1007/s11749-023-00884-9
Rahul Ghosal, Arnab Maity
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引用次数: 0
Analysis of conditional randomisation and permutation schemes with application to conditional independence testing 条件随机化和排列方案的分析及其在条件独立性检验中的应用
Pub Date : 2023-09-12 DOI: 10.1007/s11749-023-00878-7
Małgorzata Łazȩcka, Bartosz Kołodziejek, Jan Mielniczuk
Abstract We study properties of two resampling scenarios: Conditional Randomisation and Conditional Permutation schemes, which are relevant for testing conditional independence of discrete random variables X and Y given a random variable Z . Namely, we investigate asymptotic behaviour of estimates of a vector of probabilities in such settings, establish their asymptotic normality and ordering between asymptotic covariance matrices. The results are used to derive asymptotic distributions of the empirical Conditional Mutual Information in those set-ups. Somewhat unexpectedly, the distributions coincide for the two scenarios, despite differences in the asymptotic distributions of the estimates of probabilities. We also prove validity of permutation p -values for the Conditional Permutation scheme. The above results justify consideration of conditional independence tests based on resampled p -values and on the asymptotic chi-square distribution with an adjusted number of degrees of freedom. We show in numerical experiments that when the ratio of the sample size to the number of possible values of the triple exceeds 0.5, the test based on the asymptotic distribution with the adjustment made on a limited number of permutations is a viable alternative to the exact test for both the Conditional Permutation and the Conditional Randomisation scenarios. Moreover, there is no significant difference between the performance of exact tests for Conditional Permutation and Randomisation schemes, the latter requiring knowledge of conditional distribution of X given Z , and the same conclusion is true for both adaptive tests.
摘要研究了两种重采样方案的性质:条件随机化和条件置换方案,这两种方案与测试给定随机变量Z的离散随机变量X和Y的条件独立性有关。也就是说,我们研究了在这种情况下概率向量估计的渐近行为,建立了它们的渐近正态性和渐近协方差矩阵之间的排序。这些结果被用来推导这些设置中经验条件互信息的渐近分布。出乎意料的是,尽管概率估计的渐近分布不同,但这两种情况的分布是一致的。我们还证明了条件置换方案的置换p值的有效性。上述结果证明考虑基于重采样的p值和具有调整自由度数的渐近卡方分布的条件独立性检验是合理的。我们在数值实验中表明,当样本大小与三组可能值的数量之比超过0.5时,基于对有限数量排列进行调整的渐近分布的测试是对条件排列和条件随机化场景的精确测试的可行替代方案。此外,条件置换和随机化方案的精确测试的性能之间没有显着差异,随机化方案需要了解给定Z的X的条件分布,同样的结论适用于两种自适应测试。
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引用次数: 0
Comments on: Statistical Inference and Large-scale Multiple Testing for High-dimensional Regression Models 高维回归模型的统计推断与大规模多元检验
Pub Date : 2023-08-29 DOI: 10.1007/s11749-023-00880-z
Ye Tian, Yang Feng
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引用次数: 0
Correction: Novel specification tests for synchronous additive concurrent model formulation based on martingale difference divergence 修正:基于鞅差分散度的同步加性并发模型公式的新规范试验
Pub Date : 2023-05-05 DOI: 10.1007/s11749-023-00863-0
Laura Freijeiro-González, Manuel Febrero-Bande, Wenceslao González-Manteiga
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引用次数: 0
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