Ø§Ù„Ø¨Ø´ÙŠØ±, Ø., & Ù…ØÙ…Ø¯ Ø®ÙŠØ±, Ø. 2018 Dec 31. Ø¯ÙˆØ± Ø¹ÙˆØ§Ù…Ù„ Ø§Ù„Ø¨ÙŠØ¦Ø© Ø§Ù„Ø¯Ø§Ø®Ù„ÙŠØ© Ù„Ù„Ù…Ù†Ø¸Ù…Ø© ÙÙŠ Ø§Ù„ØªØ®Ø·ÙŠØ· Ø§Ù„Ø§Ø³ØªØ±Ø§ØªÙŠØ¬ÙŠ Ø§Ù„ÙˆÙ„Ø§Ø¦ÙŠ ÙÙŠ Ø§Ù„Ø³ÙˆØ¯Ø§Ù† : Ø¯Ø±Ø§Ø³Ø© ØØ§Ù„Ø© ÙˆÙ„Ø§ÙŠØ© Ø§Ù„Ø¬Ø²ÙŠØ±Ø© (2011-2017Ù…). Gezira Journal of Economic and Social Sciences. [Ø¹Ù„Ù‰ Ø§Ù„Ø¥Ù†ØªØ±Ù†Øª] 9:2