It is a widely watched series by the financial sector but gets less press coverage than the more commonly quoted consumer price index (CPI), which is also prepared by the BLS. While the CPI is a measure of inflation in consumer prices, the ECI is vital as an indication of whether employment cost changes are rising or falling and so it measures inflation of wages, and employer-paid benefits. Former Chairman of the Federal ReserveAlan Greenspan said, "The Employment Cost Index is indispensable to understanding America's economy. It ensures the accuracy of the statistics on employers' compensation costs that we rely on for economic policy making and for successful business planning." In making decisions to adjust the prime interest rate, the Federal Reserve often cites shifts in the ECI as having an effect on its decision-making process. The index is also used in determining annual US government-employee salary adjustments by across-the-board General Schedule adjustments. National Compensation Survey – Employment Cost Trends produces quarterly indexes measuring change over time in labor costs (ECI) and quarterly data measuring level of average costs per hour worked (ECEC).