فهرس المقالات محیط غیر رقابتی حرية الوصول المقاله صفحة الملخص نص كامل 1 - A New Decomposition of Cost Efficiency based on the Price and Cost based Production Possibility Sets in non-competitive space in DEA R. Fallahnejad E. Rezaei hezaveh 10.30495/ijim.2021.19052