@unpublished{Cribb2013,
author = {Jonathan Cribb and Carl Emmerson and Gemma Tetlow},
title = {Incentives, shocks or signals: labour supply effects of increasing the female state pension age in the UK},
year = {2013},
month = {Mar},
doi = {oi: 10.1920/wp.ifs.2013.1303},
issn = {1742-0415},
url = {http://www.ifs.org.uk/wps/wp1303.pdf},
}