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The most important question facing Obama that day was how large the stimulus should be. Since the election, as the economy continued to worsen, the consensus among economists kept rising. A hundred-billion-dollar stimulus had seemed prudent earlier in the year. Congress now appeared receptive to something on the order of five hundred billion. Joseph Stiglitz, the Nobel laureate, was calling for a trillion. Romer had run simulations of the effects of stimulus packages of varying sizes: six hundred billion dollars, eight hundred billion dollars, and $1.2 trillion. The best estimate for the output gap was some two trillion dollars over 2009 and 2010. Because of the multiplier effect, filling that gap didn’t require two trillion dollars of government spending, but Romer’s analysis, deeply informed by her work on the Depression, suggested that the package should probably be more than $1.2 trillion. The memo to Obama, however, detailed only two packages: a five-hundred-and-fifty-billion-dollar stimulus and an eight-hundred-and-ninety-billion-dollar stimulus. Summers did not include Romer’s $1.2-trillion projection. The memo argued that the stimulus should not be used to fill the entire output gap; rather, it was “an insurance package against catastrophic failure.” At the meeting, according to one participant, “there was no serious discussion to going above a trillion dollars.”
There were sound arguments why the $1.2-trillion figure was too high. First, Emanuel and the legislative-affairs team thought that it would be impossible to move legislation of that size, and dismissed the idea out of hand. Congress was “a big constraint,” Axelrod said. “If we asked for $1.2 trillion, it probably would have created such a case of sticker shock that the system would have locked up there.” He pointed east, toward Capitol Hill. “And the world was watching us, the market was watching us. If we failed to produce a stimulus bill, that in and of itself could have had deleterious effects.”
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http://www.newyorker.com/reporting/2009/10/12/091012fa_fact_lizza#ixzz0vqApZMfI