EcoSta 2026 EcoSta 2026 に参加し,研究発表を行いました. EcoSta 2026EcoSta 2026 website ー Testing for sphericity of autocovariance matrix in high-dimensional time series喜多 美琴,吉田 耀晟,劉 言 ー Statistical inference for multinomial-valued time series蘇 王峥恬,劉 言 Conference