@inbook{Schmitt2008a,
author = {Schmitt, C.},
title= {Increasing Childlessness in Germany},
year = {2008a},
editor = {Headey, B.},
editor = {Holst, E. },
booktitle = {A Quarter Century of Social and Economic Change: Results from the German Panel Survey (SOEP)},
address = {Berlin},
publisher = {DIW Berlin: 23-28},
}