Text and Data Mining valid from 2019-05-09
Received: 2 January 2019
Accepted: 11 April 2019
First Online: 9 May 2019
: Ms. Jingya Li is a PhD candidate of University of Macau. Dr. Ming-Hua Liu is an associate professor of the Faculty of Business Administration, University of Macau.
: The authors declare that they have no competing interests.
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