BibTex format
@article{Thirtle:2008:10.1111/j.1574-0862.2008.00316.x,
author = {Thirtle, C and Piesse, J and Schimmelpfennig, D},
doi = {10.1111/j.1574-0862.2008.00316.x},
journal = {AGRICULTURAL ECONOMICS},
pages = {73--85},
title = {Modeling the length and shape of the R&D lag: an application to UK agricultural productivity},
url = {http://dx.doi.org/10.1111/j.1574-0862.2008.00316.x},
volume = {39},
year = {2008}
}