List of Articles economic model Open Access Article Abstract Page Full-Text 1 - Nonlinear Regression Model Based on Fractional Bee Colony Algorithm for Loan Time Series Farid Ahmadi Mohammad Pourmahmood Aghababa Hashem Kalbkhani 10.52547/jist.16015.10.38.141 Open Access Article Abstract Page Full-Text 2 - The role of research and development in economic development of the countries Mahnaz Rabiei