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Authors
Lin, Lin
Zai, Xianhua
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Funding
Funding for this research was provided by:
Max Planck Institute for Demographic Research
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Article History
Received: 20 September 2024
Accepted: 19 June 2025
First Online: 16 July 2025
Declarations
:
: Not applicable.
: We confirm that we understand BMC is an open access journal that levies an article processing charge per articles accepted for publication. By submitting the article we agree to pay this charge in full if the article is accepted for publication.
: The authors declare no competing interests.
