Even with oil rallying and WTI pushing back toward $50, no one is predicting a sharp return to last summer’s $100 oil prices. While some of the effects of cheap oil are obvious, it can be tough to identify all of the secondary effects and the conflicting impacts they can have on any given sector. “Oil fluctuations impact a large number of industries in a variety of ways, making it easy for misconceptions to form,” says a Cowen and Company research paper released earlier today. “We strive to set the facts straight by articulating, for instance, why many trucking companies…