Notes, Comments and Preliminary results Mar 10 2021 Masao Kumamoto and Juanjuan Zhuo   Hedge and safe haven status of Bitcoin: copula-DCC approach   Abstract  Contact Information  Citation  Full Text  -  Note   Dec 23 2020 Juanjuan Zhuo and Masao Kumamoto   Stock market reactions to COVID-19 and containment policies: A panel VAR approach   Abstract  Contact Information  Citation  Full Text  -  Note   Dec 10 2018 Juanjuan Zhuo and Masao Kumamoto   Threshold effects of population aging on stock prices   Abstract  Contact Information  Citation  Full Text  -  Note