"If a war started, the oil price probably would go up, as you said, maybe $5, $6 a barrel until you saw other oil from the extra supplies that are available elsewhere coming into the world, into the market"

This quote by Daniel Yergin recommends that if a war were to begin, the price of oil would likely increase. This increase could be as much as $5 or $6 per barrel, however it would just be short-lived. This is since other sources of oil would appear in the market, which would assist to bring the cost back down. Yergin is recommending that the price of oil is not most likely to stay high for long, as other sources of oil will appear. This is an essential point to consider when looking at the prospective effect of a war on the price of oil. It is most likely that the price of oil would increase in the short-term, however it would not remain high for long.