Analysis of the effect of production and investment types in selected Organisation of Islamic Cooperation countries

Investment is one of the important components of the production function of the most economical country, and this is one of the main reasons for the economic development of each country. In the general case, the investment is divided into internal and external divisions, which domestic investment include public investment and private investment. Considering the role and place of trade, growth and investment, the nonlinear relationship between public and private investment is expanded in this research, and then the interaction between public investment, private investment and foreign direct investment in 45 OIC countries is analyzed. Therefore, the factors influencing the country's economic growth including public investment, private investment, foreign direct investment, and the degree of trade openness have been reviewed during the period (1997-1997). The method used in this research is the static panel data method in the form of Generalized method of moments (GMM).The results indicate that public investment, private investment, foreign direct investment, the degree of trade openness, and the population growth have been effective and meaningful in improving the country's economic growth, and is estimated at a level of 0.507%.