56 citations · 225 across the 37 of their papers we have counts for
4 papers · 1 filter
Higher Moment Estimation for Elliptically-distributed Data: Is it Necessary to Use a Sledgehammer to Crack an Egg?
Zheng Tracy Ke, Koushiki Bose, Jianqing Fan
Multivariate elliptically-contoured distributions are widely used for modeling economic and financial data. We study the problem of estimating moment parameters of a semi-parametri…
Improvements on SCORE, Especially for Weak Signals
Jiashun Jin, Zheng Tracy Ke, Shengming Luo
A network may have weak signals and severe degree heterogeneity, and may be very sparse in one occurrence but very dense in another. SCORE (Jin, 2015) is a recent approach to netwo…
State Aggregation Learning from Markov Transition Data
Yaqi Duan, Zheng Tracy Ke, Mengdi Wang
State aggregation is a popular model reduction method rooted in optimal control. It reduces the complexity of engineering systems by mapping the system's states into a small number…
Network Global Testing by Counting Graphlets
Jiashun Jin, Zheng Tracy Ke, Shengming Luo
Consider a large social network with possibly severe degree heterogeneity and mixed-memberships. We are interested in testing whether the network has only one community or there ar…