On March 20, a study by the American Petroleum Institute (API) in conjunction with NERA Economic Consulting was released, stating that the federal renewable fuels mandate could lead to a rise in the cost of producing gasoline by 30 percent by 2015. The study goes on to say the mandate might raise consumer gasoline prices, lower the country’s gross domestic product (GDP) by $770 billion, increase the cost of producing diesel by 300 percent, and decrease worker take-home pay by $580 billion.