@inbook{Allison2014,
author = {Allison, P.D.},
title= {Discrete-time methods},
year = {2014},
doi = {10.4135/9781452270029},
editor = {Allison, P.D.},
booktitle = {Event history and survival analysis},
address = {Newbury Park, CA},
publisher = {Sage Research Methods},
pages = {7‒18},
}