Oil prices have plunged recently, affecting everyone: producers, exporters, governments, and consumers. Overall, we see this as a shot in the arm for the global economy. Bearing in mind that our simulations do not represent a forecast of the state of the global economy, we find a gain for world GDP between 0.3 and 0.7 percent in 2015, compared to a scenario without the drop in oil prices. There is however much more to this complex and evolving story. In this blog we examine the mechanics of the oil market now and in the future, the implications for various groups of countries as well as for financial stability, and how policymakers should address the impact on their economies.