@article{Wachter2005,
author = {Wachter, K.W.},
title= {Tempo and its tribulations},
year = {2005},
doi = {10.4054/DemRes.2005.13.9},
URL = {http://www.demographic-research.org/volumes/vol13/9/},
journal = {Demographic Research},
volume = {13},
number = {9},
pages = {201--222},
}