@article{Qin2015,
author = {Qin, M. and Zhuang, Y. and Liu, H.},
title= {Old age insurance participation among rural-urban migrants in China},
year = {2015},
doi = {10.4054/DemRes.2015.33.37},
volume = {33},
number = {37},
pages = {1047--1066},
}