Erdinc Telatar Hacettepe University, Department of Economics, Beytepe, 06810, Ankara, Turkey   Hacettepe Universitesi Iktisadi ve Idari Bilimler Fakultesi Iktisat Bolumu / Beytepe Kampusu Ankara, 06810 Turkiye   etelatar@hacettepe.edu.tr             JEL Areas: O4 : Economic Growth and Aggregate Productivity: General