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Demography > 2017 > 54 > 5 > 1677-1714
China Economic Review > 2016 > 41 > C > 62-74
World Development > 2010 > 38 > 7 > 989-1000
Demography > 2017 > 54 > 5 > 1677-1714
China Economic Review > 2016 > 41 > C > 62-74
World Development > 2010 > 38 > 7 > 989-1000