@techreport{Howe2004,
author = {Howe, N.  and Jackson, R. },
title= {Projecting immigration: A survey of the current state of practice and theory},
year = {2004},
URL = {http://crr.bc.edu/wp-content/uploads/2004/12/wp_2004-32.pdf},
publisher = {Center for Retirement Research at Boston College },
address = {Chestnut Hill},
number = {CRR WP No. 2004-32},
}