Oil has for decades been perceived as a necessary and highly addictive energy commodity, fueling the world economy. It is a crucial input good for most of the net-oil consumer countries, and it is an important source of revenue for the net-oil supplier countries. This means that any changes in the oil price will affect the entire world economy. However, the extent to which the oil-price fluctuations matter for the economy depends on the perspective (e.g. whether it is that of the macro economy, international trade, firm strategies, or the climate economy). In this policy brief, we outline the answers to this question that were provided at the 9th SITE Energy Day, held at the Stockholm School of Economics on November 5, 2015.