Wei Cai

The Signaling Value of Internal Employee Coordination

Journal of Accounting Research · 2025-05-27

ABSTRACT We examine the effect of internal employee coordination on customer trust, focusing specifically on employees’ responsiveness to each other as an important, quantifiable, and objective aspect of internal coordination. Using proprietary data from a company with exogenous assignment of employees to teams that serve individual customers, we study how inter‐employee responsiveness influences customer trust. Each customer is served via an app‐based group chat by a randomly assigned team of e…

Large Deviations of First Passage Times of Branching Random Walks in $\mathbb{R}^d$: Asymptotics and Algorithms

ArXiv.org · 2025-06-18

We investigate the large deviation probabilities of first passage times (FPT) of discrete-time supercritical non-lattice branching random walks (BRWs) in $\mathbb{R}^d$ where $d\geq 1$. The FPT refers to the first time the BRW enters a ball of radius one with a distance $x$ from the origin, conditioned upon the process's survival. Furthermore, we apply the spine decomposition technique to construct an asymptotically optimal polynomial-time algorithm for computing the lower large deviation probab…

TeleAI-Safety: A comprehensive LLM jailbreaking benchmark towards attacks, defenses, and evaluations

ArXiv.org · 2025-12-05

While the deployment of large language models (LLMs) in high-value industries continues to expand, the systematic assessment of their safety against jailbreak and prompt-based attacks remains insufficient. Existing safety evaluation benchmarks and frameworks are often limited by an imbalanced integration of core components (attack, defense, and evaluation methods) and an isolation between flexible evaluation frameworks and standardized benchmarking capabilities. These limitations hinder reliable…