CBO on Fiscal Policy Lags

From CBO, here is the time path of estimated outlays on government purchases under the proposed stimulus bill:

2009: 29.0
2010: 115.8
2011: 105.5
2012: 53.6
2013: 26.5
2014: 13.0
2015: 6.9
2016: 3.0
2017: 1.6
2018: 0.9
2019:0.4

Total: $356.0 billion

So only 8 percent of this spending occurs in budget year 2009, and only 41 percent occurs in first two years. Note that spending on transfer payments and tax relief occurs much faster than this: click through to the above link for details.