3 papers
math.ST2026
Sigmoid-FTRL: Design-Based Adaptive Neyman Allocation for AIPW Estimators
Fangyi Chen, Shu Ge, Jian Qian +1
We consider the problem of Adaptive Neyman Allocation for the class of AIPW estimators in a design-based setting, where potential outcomes and covariates are deterministic. As each…
stat.ME2026
A Dynamic Factor Model for Multivariate Counting Process Data
Fangyi Chen, Hok Kan Ling, Zhiliang Ying
We propose a dynamic multiplicative factor model for process data, which arise from complex problem-solving items, an emerging testing mode in large-scale educational assessment. T…
stat.ME2025
Dynamic Factor Analysis of High-dimensional Recurrent Events
Fangyi Chen, Yunxiao Chen, Zhiliang Ying +1
Recurrent event time data arise in many studies, including biomedicine, public health, marketing, and social media analysis. High-dimensional recurrent event data involving many ev…