O2 (Poland):
So many minutes of sleep loses his mother when she wakes up her baby
28 February 2017
The study is based on data about the life of 14 thousand. the British families. Was collected from the birth of a child in the family up to the 25 years of his life. Applications have developed Joan Costa-and-Font and Sarah Flèche from the Centre for Economic Performance at the London School of Economics and Political Science.