ISSN 1791-3144 DEPARTMENT OF ECONOMICS DISCUSSION PAPER SERIES Illegal Immigration in a Heterogeneous Society Theodore Palivos and Chong K. Yip WP 2007 - 02 Department of Economics University of Macedonia 156 Egnatia str 540 06 Thessaloniki Greece Fax: + 30 (0) 2310 891292 http://econlab.uom.gr/econdep/