@unpublished{Blundell2008,
author = {Richard Blundell and Andrew Shephard},
title = {Employment, hours of work and the optimal taxation of low income families},
year = {2008},
month = {Jan},
volume = {pp.},
doi = {10.1920/wp.ifs.2008.0801},
issn = {1742-0415},
url = {http://www.ifs.org.uk/wps/wp0801.pdf},
}