Funding for this research was provided by:
Youth Funds of Research for Humanities and Social Sciences by the Ministry of Education, China (17YJC840039)
National Social Science Foundation of China (18BSH154)
Text and Data Mining valid from 2019-11-07
Received: 13 April 2019
Accepted: 22 October 2019
First Online: 7 November 2019
Ethics approval and consent to participate
: The data for this study came from the China Family Panel Studies (CFPS). CFPS was reviewed and approved by the Institute of Social Science Survey (ISSS) of Peking University. All participates in the survey were asked for written informed consent. The data were released to the researchers without access to any personal data.
: Not applicable.
: None of the authors have any competing interests.