VOLUME 3, NUMBER 1, MARCH 2011 VALUES ECONOMICS, THEOLOGY AND LEGITIMACY: CATHOLIC SOCIAL THOUGHT AND ITS IMPLICATIONS FOR LEGAL REGULATORY SYSTEMS     LARRY CATÁ BACKER, Pennsylvania State University MARKET INSTITUTIONS: AN EXPOSITORY ESSAY     NIRVIKAR SINGH, University of California-Santa Cruz COMPARATIVE ANALYSIS OF THE EFFECTS OF PROXY RESPONDENTS AND SELF-RESPONDENTS ON HOUSEHOLD SURVEYS     LEVENT GOKDEMIR, Inonu University FACTORS AFFECTING PRODUCTIVITY IN THE LIBYAN CONSTRUCTION PROJECTS: A CASE STUDY     ABDELNASER OMRAN, Universiti Sains Malaysia MOHAMMED SALLEH HAMMAD, Universiti Sains Malaysia ABDUL HAMID KADIR PAKIR MAMAT, Universiti Sains Malaysia FACTORS AFFECTING COST PERFORMANCE IN CONSTRUCTION PROJECTS WITHIN KELANTAN STATE IN MALAYSIA ABDELNASER OMRAN,Universiti Sains Malaysia SITI NORHYDAYATON BINTI MAMAT,Universiti Sains Malaysia OPINIONS OF THE TURKISH POSTGRADUATES IN THE UNITED STATES REGARDING RETURN TO TURKEY: AN ANALYSIS IN TERMS OF BRAIN DRAIN MEVLUDİYE SİMSEK,Bilecik University