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math.ST2025
Testing degree heterogeneity in directed networks
Lu Pan, Qiuping Wang, Ting Yan
In this study, we focus on the likelihood ratio tests in the model for testing degree heterogeneity in directed networks, which is an exponential family distribution on direc…
math.ST2025
Moment estimation in paired comparison models with a growing number of subjects
Qiuping Wang, Lu Pan, Ting Yan
When the number of subjects, , is large, paired comparisons are often sparse. Here, we study statistical inference in a class of paired comparison models parameterized by a set…
math.ST2025
Maximum likelihood estimation in the sparse Rasch model
Pai Peng, Lianqiang Qu, Qiuping Wang +2
The Rasch model has been widely used to analyse item response data in psychometrics and educational assessments. When the number of individuals and items are large, it may be impra…