6 papers
Purging the Gray Zone: Latent-Geometric Denoising for Precise Knowledge Boundary Awareness
Hao An, Yibin Lou, Jiayi Guo +1
Large language models (LLMs) often exhibit hallucinations due to their inability to accurately perceive their own knowledge boundaries. Existing abstention fine-tuning methods typi…
Starting Off on the Wrong Foot: Pitfalls in Data Preparation
Jiayi Guo, Panyi Dong, Zhiyu Quan
When working with real-world insurance data, practitioners often encounter challenges during the data preparation stage that can undermine the statistical validity and reliability…
Entity-Specific Cyber Risk Assessment using InsurTech Empowered Risk Factors
Jiayi Guo, Zhiyu Quan, Linfeng Zhang
The lack of high-quality public cyber incident data limits empirical research and predictive modeling for cyber risk assessment. This challenge persists due to the reluctance of co…
Reliable Selection of Heterogeneous Treatment Effect Estimators
Jiayi Guo, Zijun Gao
We study the problem of selecting the best heterogeneous treatment effect (HTE) estimator from a collection of candidates in settings where the treatment effect is fundamentally un…
A Relative Error-Based Evaluation Framework of Heterogeneous Treatment Effect Estimators
Jiayi Guo, Haoxuan Li, Ye Tian +1
While significant progress has been made in heterogeneous treatment effect (HTE) estimation, the evaluation of HTE estimators remains underdeveloped. In this article, we propose a…
Impact of Trip Distance Distribution Time Dependency and Aggregation Levels in Bathtub Models -- A Comparative Simulation Analysis
Jiayi Guo, Irene MartÃnez, Gonçalo Correia +1
Bathtub models are used to study urban traffic within a certain area. They do not require to take into account the detailed network topology. The emergence of different bathtub mod…