Carlos Pestana Barros & Nicolas Peypoch A Comparative Analysis of Productivity Change in Italian and Portuguese Airports WP 006/2007/DE _________________________________________________________ Paula Albuquerque & José Passos Grandparents and women’s participation in the labor market WP 16/2010/DE/SOCIUS/CEMAPRE _________________________________________________________ Department of Economics WORKING PAPERS ISSN Nº 0874-4548 School of Economics and Management TECHNICAL UNIVERSITY OF LISBON