@article{Aghion2009,
author = {Philippe Aghion and Richard Blundell and Rachel Griffith and Peter Howitt and Susanne Prantl},
title = {The effects of entry on incumbent innovation and productivity},
journal = {Review of Economics and Statistics},
year = {2009},
month = {Feb},
volume = {91},
number = {1},
pages = {20-32},
url = {http://www.ifs.org.uk/docs/abghp_final.pdf},
}