The previous Chairman of the US Federal Reserve, Ben Bernanke, recommended in 2004 th the former 10 to 15 years, numerous advanced national banks turned out to be somewhat at control of the cash supply, prompting a smoother business cycle, with downturns having tendency to be more modest and less successive than in prior many years, a peculiarity nat Great Moderation"[48] This hypothesis experienced analysis during the worldwide moneta emergency of 2008-2009. [citation needed] Furthermore, it is possible that the elements of national bank need to incorporate more than the moving up or down of loan costs or bank [citation needed] these devices, albeit significant, may not truth be told moderate the unpredictability of cash supply (or its velocity). [citation need