Feb 12 2014 Maoyong Fan , Mimi Houston and Anita Alves Pena   Determinants of child labor in the modern United States: Evidence from agricultural workers and their children and concerns for ongoing public policy   Abstract  Contact Information  Citation  Full Text  -  Note   Sep 02 2011 Carlo Alcaraz , Daniel Chiquiar and Manuel Ramos-Francia   Wage differentials in Mexico's urban labor market   Abstract  Contact Information  Citation  Full Text  -  Preliminary Result   Jan 14 2008 Morris Altman   How much economic freedom is necessary for economic growth? Theory and evidence   Abstract  Contact Information  Citation  Full Text  -  Note