The NBER working paper is from 2006, but it was published as a journal article in 2007:<p><pre><code> @article{Fisman2007,
author = {Raymond Fisman and Edward Miguel},
title = {Corruption, Norms and Legal Enforcement:
Evidence from Diplomatic Parking Tickets},
journal = {Journal of Political Economy},
volume = 115,
number = 6,
year = 2007,
pages = {1020--48},
}</code></pre>