US shale oil has created dramatic changes in international markets. The United States became the world's biggest producer of crude after it overtook Saudi Arabia and Russia then returned to exporting a stop that lasted more than four decades. Its imports decreased significantly. had remarkable impact on structure trade; Other producers, including OPEC, were affected by decline their shares glob...

In the global economy, crude oil is among the most important strategic goods that affects the performance of local and international markets. Prediction of the oil price has always been an important challenging topic in the global economy and producers and consumers have constantly been trying to improve their roll in the oil price changes and for many years OPEC has been one of the key players...

Oil sector is the most effective sector in these countries. Oil is the most important product that world industries use as the cheapest energy. The price of oil depends on the world’s supply and demand and many economic, political and geographical variables. This is the reason why the price of oil has fluctuations. The fluctuations in oil price lead to fluctuate in the oil revenues of the membe...

Background: infant mortality rate is one of the main health indicators for assessing the health system’s performance over the world. We aim to examine the socioeconomic and health system factors affect infant mortality in OPEC from 2004 to 2013. Methods: was used to examine the effects of some of the key explanatory factors (total fertility rate per women, GDP per capita (current US$), public h...