Which is more influential, "Who" or "When" for a user to rate in online review site?

Kazumi Saito, Kouzou Ohara, Masahiro Kimura, Hiroshi Motoda. Which is more influential, "Who" or "When" for a user to rate in online review site?. Intell. Data Anal., 22(3):639-657, 2018. [doi]

Abstract

Abstract is missing.