@article{Huang2016,
author = {Huang, Wei and Lei, Xiaoyan and Zhao, Yaohui},
title= {One-child policy and the rise of man-made twins},
year = {2016},
doi = {10.1162/REST\_a\_00567},
URL = {https://doi.org/10.1162/REST\_a\_00567},
volume = {98},
number = {3},
pages = {467--476},
}