@unpublished{Bloom2000,
author = {Nicholas Bloom and John Van Reenen},
title = {Patents, productivity and market value: evidence from a panel of UK firms},
year = {2000},
month = {Dec},
volume = {pp},
doi = {10.1920/wp.ifs.2000.0021},
issn = {1742-0415},
url = {http://www.ifs.org.uk/wps/wp0021.pdf},
}