Correspondence to: † Jung’s work has been partially supported by National Research Foundation of Korea (NRF) grants funded by the Korean government (MIST)(No. 2022R1F1A1071126 and No. 2022M3J6A1063595).
The contributions of the students are equal.
1 Graduate student, Department of Statistics, Korea University, Seoul 02841, Korea.
2 Graduate student, Department of Statistics, Korea University, Seoul 02841, Korea.
3 Graduate student, Department of Statistics, Korea University, Seoul 02841, Korea.
4 Graduate student, Department of Statistics, Korea University, Seoul 02841, Korea.
5 Data Analytics Labs, Kakao Games Corporation, Gyeonggi 13529, Korea.
6 Corresponding author: Professor, Department of Statistics, Korea University, Seoul 02841, Korea. E-mail:
yoons77@korea.ac.kr