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Xu, Huanan https://orcid.org/0000-0002-5750-7457
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Article History
Received: 7 September 2017
Accepted: 27 March 2018
First Online: 11 October 2018
Competing interests
: The IZA Journal of Development and Migration is committed to the IZA Guiding Principles of Research Integrity. The author declares that she has observed these principles.
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