@article{Jacob2003,
author = {Jacob, B.A. and Lefgren, L.},
title= {Are idle hands the devil’s workshop? Incapacitation, concentration, and juvenile crime},
year = {2003},
doi = {10.3386/w9653},
journal = {American Economic Review },
volume = {93},
number = {5},
pages = {1560--1577},
}